Lex Luthor

"We must put faith in ourselves, but instead, we look up to him, with big glassy eyes because we think he's invincible. It's my duty to dispel the world of that notion. And when he dies, they will finally wake up and see him for what he really was, a false god."

- Lex Luthor to Lena Luthor

Alexander Joseph "Lex" Luthor is a billionaire industrialist, inventor, and scientist, as well as one of the most intelligent people in the world and the best friend-turned-archenemy of Superman, whom he views as an obstacle to his megalomaniacal plans and as a threat to the very existence of humanity. A charismatic and well-known yet controversial public figure, Lex was the CEO of Luthor Corp until he was succeeded by his half-sister Lena following his incarceration of 32 consecutive life sentences at Stryker's Island Penitentiary. He later managed to escape from prison to continue his war against Kryptonians.

Early life
Lex was born in Metropolis to billionaires Lionel and Lillian Luthor. He hails from one of the city's wealthiest and most prestigious families. Since early childhood, he exhibited an extremely high intellect which made his mother greatly proud of him, often referring to him as a "genius" and being very close to him as he grow up.

During his early childhood, Lex had a dog named Ignatius, which he considered his closest companion, but when he was 7 years old, Ignatius fell ill and had to be put down. Lex wanted to be present at the procedure, but Lillian felt that he was too sentimental and forced him to go on a business trip with his father. There, they were accompanied by a woman to which Lionel gave all of his attention. At first, Lex swore to himself that he would loathe the woman for taking his father from him when he needed him the most, but couldn't keep his promise because of how kind she was to him. On the day they put down Ignatius, the woman embraced Lex and sang him a beautiful Irish song in order to comfort him. By the end of the trip, Lex wished that the woman was his mother.

In 1997, after Lena (whom Lex figured out early on was secretly Lionel's illegitimate daughter with the woman on their business trip) was adopted into the Luthor family after her mother's death, Lex made her feel especially welcome. When they first met, he invited her to play a game of chess that the four-year-old girl eventually won.

During their youth, Lex and Lena were very close, and Lex would always challenge Lena to succeed in her inventions , always being very hard to her, since he acknowledged her potential and considered his behavior the best way to ensure that she would keep getting better.

According to Lena, Lex would build anthills for days in order to make ants believe they were coming back home before setting them on fire. Also, in their school days, both he and Lena had a latin tutor named Krinick who, every time Lex misquoted Salutati, sent him in a corner and forced him to repeat "Ego me non placebo" ("I don't like myself") until his Latin improved. He learned to play chess from Russian grandmaster Anatoly Karpov.

Despite being deeply loved by his mother and half-sister, Lex had a difficult relationship with his father, as Lionel was distant and favored Lena over him.

Lex inherited the family company, Luthor Corp, after his father passed away, becoming the new CEO. He then hired Mercy and Otis Graves as head of the company's security and a member of security, respectively. Over time, Lex's relationship with Mercy grew deeper and she eventually became his closest confidant and frequent dinner guest. It was even strongly implied that there was a romantic connection between them.

Illegal business with Bruno Mannheim
At some point, Lex became partners-in-crime with Bruno Mannheim for illegal schemes related to Luthor Corp. With Lex's help, Mannheim laundered money through Luthor Corp, but he soon dumped Lex as his partner when the latter was investigated by the state. The center of the scheme were parking lots which Mannheim purchased through a subsidiary he bought from Lex. According to Lena, it was Lex's relationship with Mannheim that sent him down the wrong path in his life.

Dealings with Superman
Years later, Lex became best friends with the Kryptonian superhero Superman and they initially worked together to repel the threat of alien invasions. However, Lex's methods were far crueler than Superman's, which set them at odds. Although Superman tried hard to trust his friend, defending him against the accusations of others and continuing to give him several chances to atone for his wrong deeds, Lex ultimately proved unable to forever deceive Superman, who eventually realized his true nature; this consequently resulted in a falling out between the pair. Shortly after this, Lex came to believe that Superman himself was the cause of alien terrorism, since his presence attracted extraterrestrials, and declared war on his former friend, becoming his greatest enemy. Lex's obsession with defeating Superman eventually destroyed his relationship with Mercy as she had grown frustrated with his hyper-focus on Superman instead of looking at the bigger picture, referring to the alien threats.

After Lex started targeting Superman, Lena grew concerned for his well-being and tried to help him, but he ignored her ; this caused their relationship to fracture as he kicked her out of the company and proceeded with his plans to destroy Superman, committing unspeakable crimes, one of which was triggering a fault line in California with an "earthquake machine", which was tended to by Superman. Another incident involved Lex creating and selling a series of battle armors he called "Lexosuits", which Superman was not happy about. Lex would use the Lexosuit to even the playing field when facing the Kryptonian.

Over the years, Lex built many secret storage facilities around the world, where he kept arsenals of weapons that he collected to defeat Superman once-and-for all. He also converted his own cloaked mansion's basement into a bunker designed to protect him from any threats, only confiding in Lena of the mansion's location.

Lex went so far as to inject himself with Kryptonite in order to keep Superman away from him, as well as to kidnapping James Olsen torturing him and leaving him with sixteen scars.

Incarceration
After several years and various brutal encounters resulting in numerous fatalities, in early 2015, Lex and Superman had a final confrontation, prior to which Lex turned Earth's yellow sun red in an attempt to depower the Kryptonian, consequently causing destruction on a global scale. He took Lena captive in his office in Metropolis while observing the results of his work from various monitors. As his half-sister tearfully told him that he didn't have to go through with his actions, Lex, quoting a sentence from Epicurus, claimed he was doing it for the entire human race, then, taking her in front of the window to listen the citizens' cries of pain, commented that they were already cheering. When Lena angrily replied that he would kill millions of people as the world couldn't live under a red sun, Lex responded that not even Superman can and explained that humans had grown complacent and they must put faith in themselves instead of looking up to Superman. He considered it his duty to dispel the world of the notion that Superman was invincible since, by killing the Kryptonian, Lex would finally wake them up and show them what Superman really was: A false god. Shocked after seeing him shoot down a Metropolis Police Department helicopter during his monologue, Lena commented in disgust that at least Superman was a good man, causing Lex to yell in anger that he wasn't and he (Lex) should be the "Man of Tomorrow" instead. Lena then asked if then was all about his ego, to which Lex answered it was for science as he wanted to see if the Kryptonian could bleed, since even gods can die. Then, a team of agents stormed into the office and Lex calmly allowed them to arrest him, telling his half-sister that one day everyone would thank him for what he had done.

Lex was somehow able to escape from them, being subsequently recaptured at his mansion after Superman managed to thwart his plans and finally defeat him. With the full extent of his crimes exposed to the public, he underwent a trial on wich Mercy was a key witness, betraying him, also both James and Lena (the latter revealing she was wearing a wire when he turned the sun red) testified about his actions. Lex scribbled in Kryptonese on a sheet for the duration of said testimonies and, as before reading the verdict the judge asked him if he had any statements, he replied that "Supermen made him do it" stating that he was trying to protect humanity from extintion since aliens lived among them and there would always be a "before" and an "after" Superman. After the judge condamned him to 31 consecutive life terms, she and the jury started to cough and eventually died poisoned, to wich Lex poited sarcastically that maybe 32 was better, being consequently dragged away by the guards.

Lex was incarcerated for said consecutive life terms in Stryker's Island Penitentiary, where he was visited by Eve Teschmacher whom he noticed amongst the crowd, calling out to him while being taken away from court, prompting him to have Otis recruit her since he recognized her as the fangirl who sent him several letters over the years. During their meeting, Lex asked her to infiltrate CatCo Worldwide Media to spy on James Olsen.

After Lena took over Luthor Corp, with plans to rename it to "L-Corp" and atone for Lex's crimes, he hired John Corben to assassinate her in National City. However, his plan was thwarted by Superman and Supergirl. Corben was nearly killed and later turned into the Kryptonite-powered cyborg known as Metallo by Project Cadmus, headed by Lillian.

Plotting with Kaznia
While in prison, Lex spent the next few years planning his escape, corrupting the director, as well as the guards and the other inmates; Furthermore, to alleviate boredom, he began to engrave on the wall of his cell a bas-relief depicting Hannibal crossing the Alps. Then, in early 2019, he was informed by Kaznia's Minister of Defense about the existence of the copy of Supergirl and, after leaving an hologram in his cell at his place, he leave prison for seventy two hours and reached for her in Kaznia, eventually founding the girl in a cabin in the woods after she saved a young boy from some thieves, due to her only memory: the name "Alex". Relying on this, Lex convinces the copy to be "Alex" and accepted the offer of the Kaznian government to condition her in order to make her a weapon, then, after Eve recognized a soldier who had made the copy "uncomfortable", Lex ordered for him to be executed and later scolded Eve for flinching during this. He got close to the copy and asked her if she would like to learn how to control her strength, then having a first training session with her, and beginning to instruct, promising her to explain everything regarding her origins and sending her books and other material before departing due to his seventy two free hours having nearly expired. Moving away, he asked Eve how the copy's existence could be possible, to which she replied revealing him about the Harun-El and her experiments with Lena. Lex complimented her and ordered her to ensure she got results with her research, then explained his plan to force a war between United States and Kaznia to foil it and become a hero in the eyes of public opinion, ordering Otis to manipulate his sister to create the Children of Liberty placing Ben Lockwood as their leader to serve as the "All-American Hero" to use as a scapegoat, while Lex came back to prison since considering it "the best alibi".

Some weeks later, he came back to the copy in Kaznia, to control her training and continue to teach her English, during a game of chess, Lex told the copy to consider her very similar to his sister, who, however, had disappointed and abandoned him; after which he scolded her for appreciating The Great Gatsby (one of the book he had sent her) instructing her on how capitalism makes men weak and that the only reason he has money is to fight them. Later, as the Children of Liberty released Kryptonite into the Earth's atmosphere, Lex placed the copy into a special confinement cube to protect her and pierced her ears to make her more similar to Supergirl. Lex decided to spend the time necessary for the cloud to clear up to tell the copy that she was one of the last Children of Krypton and that her task was to start a period of peace on Earth by bringing together all the peoples and fighting the champions of corrupt governments: Superman and Supergirl. He also told her that Supergirl was her sister and robbed her of her place in the World.

After a month, he took the copy to National City under the alias of "Linda Lee", in order to let her see how dissolute are the lives of the people that Supergirl protected. Lex also brought "Linda" to see Kara Danvers' apartment (revealing to know her secret identity) so that she learned her way of thinking and developed disgust for her counterpart's luxurious lifestyle. While there, Lex and "Linda" were almost caught by Alex, but the copy managed to deceive her and posing as Kara. Few hours later, he was informed by Eve that the copy "has a conscience" and it could be a problem for their project, as she founded her while trying to approach Lena at CatCo, so, in order to strengthen her resentment towards the Americans, Lex ordered she and Otis to stage the bombardment of the house of the child that the copy saved, by an American aircraft carrier. However, as she discover it, she attacked the aircraft, ignoring Lex's advise not to do it, and, after he stopped her and staged her attack at the platform to seem like an accident, he scolded her for having risked to compromise all their work due to a moment of weakness, after the copy confronted him about everything he wasn't telling her, Lex simply replied she had "disappointed" him.

Cancer
Months later, Lex was informed that the copy was sick due to some sort of disease and, against all of Eve's advises not to do it, he decided to enter a radioactive chamber in order to developed an inoperable cancer telling everyone that it was due to having previously injected himself with Kryptonite. His plan worked and he eventually suffered a stroke, so he contacted Lena for assistance and she decided to help him. Knowing that Lena was working on the Harun-El in search of a cure for cancer, Lex pulled some strings, arranging for her to work with the D.E.O. and use their resources, with Colonel Lauren Haley oblivious to the fact that he was behind it. He also sent Eve, to shoot James Olsen and use his signal watch to call Supergirl onto the scene as part of a larger plan.

Cure and escape
Freed from prison on a mercy furlough, Lex was transported to his mansion on a helicopter, escorted by a massive deployment of FBI agents. After he arrived and Lena coldly asked if he wanted to see her so badly, Lex sarcastically answered he missed her. After he was escorted inside and handcuffed to a wheelchair by the federal agents, Lex explained that they never let him out of their sight as if they feared he would escape like a dog without a leash, to which Lena told him he would have done it, causing Lex to smile and told her he couldn't due to his condition, reminding her that he was dying. Lena replied sarcastically that she knew it, since in the past six weeks he only spoke about that during their phone calls. Lex told her that he was not accustomed to needing help, telling he considered it "weak" and "pathetic", as well that he would be saved if she tested the Harun-El on humans. After Lena firmly refused, he asked her what was the meaning of all he had done to help her have better resources to her work then, asking if everything she really wanted was "a front row seat to watching him die", to which she replied that despite everything he was her brother and she wanted to save him. They were interrupted by Eve Teschmacher, who entered the room in panic to inform Lena about James, and was mocked by Lex who asked for a macchiato, telling her to call him "Lex" as it was easy to write. Once Lena came back from the hospital and asked him to help her work on the Harun-El in order to save James' life as well as his own, Lex commented on the irony of the two of them working together to save "Superman's pal," wondering what would their mother had think, all while staring at a painting of Lillian. While working at the Harun-El remembering the times they "worked together" as children, Lex felt sick and started coughing up blood, so Lena called a guard to bring him a glass of water but he let it fall to the floor, saying he could lick it like a dog. Before Lena could react, Lex told her that he was used to it since "he wasn't very popular in prison." He then told her that he was proud of her and her accomplishments, right before saying to get back to work as sentimentality would have killed him faster than his cancer. Lex was subsequently assaulted by an utterly indifferent government agent and, while Lena helped him by telling the agent to gave her the keys to his handcuffs, he told his sister not to blame the man as "He knows not what he does," comparing himself to Jesus. Later, while Lex and Lena were testing the Harun-El drug on tumorous hearts while reminiscing about their childhood, they finally managed to shrink the tumor but, moments later, Lena received a phone call from Alex Danvers and was informed that James was about to undergo a surgical operation with a high risk of death. As she fell depressed and stated she couldn't save James anymore, Lex told her that he always knew she was his half-sister and revealed the beautiful memory he had of her mother, stating that, unlike him who was born from hate, Lena was born from love and even if the rest of their family lurked in darkness with pride, she would always fall into the light. Then he urged her to reach for James, telling her that he needed her. After Lena left, Lex remotely cut off the backup power of the hospital during the power outage caused by Manchester Black, forcing his sister to inject James with the Harun-El in order to save his life. However, Lena realized what he had done and confronted him while he was having a cup of tea. Lex immediately admitted that he was responsible for the hospital's blackout as well as James' shooting in order to give Lex the incentive and a human test subject on which she could test the Harun-El to guarantee its safety to be used as a healing agent. When a disgusted Lena replied that she would never give him the cure, Lex, not surprised, revealed that he already had someone administer it to him. The FBI agent in the room then revealed himself to be Otis, thought to be dead and disguised by an image inducer, and he restrained Lena to Lex's wheelchair after the latter stood up and tore off his prison garb to reveal a sharp suit. Lex then called for Eve, who entered and shot another federal agent, revealing she was working with Lex all along. Lex revealed he had no intention of killing Lena, then ordered Otis to chloroform her and Eve to "take care of her." He then left the mansion, killing a handful of federal agents with the mansion's security systems and another group of agents with landmines hidden in the ground. Then, Lex prepared to flee by helicopter, only to be intercepted by Supergirl, whom he was happy to finally meet in person.

Lex quickly jumped out of the helicopter and donned his Lexosuit being chased by Supergirl through Metropolis' skies and over the roof of the Daily Planet, there Lex had a brief confrontation with her revealing to have developed powers thanks to the Harun-El and then lifting the Daily Planet's globe to smash it on Supergirl. Few hours later he arrived to Kaznia and gave Supergirl's copy a blood transfusion in order to restore her health, apologizing with her for having leave, giving her a suit and calling her his legacy: his Red Daughter.

Personality
"He is not a man! I was the Man of Tomorrow, not him! Not him!"

- Lex Luthor to Lena Luthor

Lex is a human supremacist who truly believes his crusade against aliens to be a righteous one, as he committed unspeakable acts in his attempt to protect Earth from alien invaders. He is a narcissist and a psychopath, with a complete lack of conscience, empathy, and remorse for his actions. Lex's psychopathy stems back to his childhood, where he would frequently torture and murder animals, as well as constantly criticize his half-sister to push her. According to Lena, Lex was always a psychopath and because of this is willing to do anything or hurt anyone to achieve his goals. He manipulates, tortures, and kills without conscience or empathy for his victims. Lex is extremely callous towards the well-being of others as, despite claiming that he wants the best for humanity, he displayed no qualms about murdering millions of people to accomplish his goals, he considers himself the real "Man of Tomorrow" and is sure that, in the end, people will understand and thank him for his actions.

Lex often presents himself as a calm, level-headed, patient, and sarcastic man, but he is very prone to losing his temper and yelling in a delusional manner. His ego, arrogance and megalomaniac trends are so great that, even while suffering a seizure under the watch of an utterly indifferent government agent, he couldn't help but compare himself to Jesus Christ, muttering to Lena, "Don't blame him. He knows not what he does".

Lex was once best friends with Clark Kent (under the guise of Superman) as the two initially tried to work together to repel the threat of alien invasions, but his methods were far crueler than Clark's. Despite Clark doing his best to trust Lex and give him chances to atone for his actions, the two ultimately fell out and became bitter enemies, with Lex, for his part, coming to believe that Superman himself was the cause of alien attacks, which led him to declare war on Superman, committing unspeakable crimes in his relentless crusade to take down the Kryptonian.

Lex is ruthless not only towards aliens, but also towards his own family as well, as he hired Corben to kill Lena simply because she was going to rename the family company, which did not sit well with Lex as he was proud of his family's name. These negative traits of his are what eventually led to Lex's incarceration. Despite this, he has proven to care for Lena as he does have a link he can't break with her and to some degree, he acknowledges that she is incredibly gifted as an intellect and a scientist, so he loves her in a twisted and narcissistic way due to finding them both "alike".

Despite having a difficult relationship with his father and falling out with his half-sister, Lex remained fond of his mother, since she seemed to agree with his views, even kept a portrait of Lillian in his mansion. However, when he met Lena's mother during childhood, he wished she was his, though this may have merely been a young Lex's attempts to manipulate his family.

Overall, Lex is completely capable of committing horrible crimes, such as mass murder, without conscience or hesitation, and displays a sadistic side to him, such as when he gleefully took down federal agents using his mansion's security systems while calmly strolling out of his house. He has proven to be several steps ahead of his opponents, even having had a hand in the events of surrounding the rise of the Children of Liberty and Lena's experiments with the Harun-El.

Due to his profound psychopathy, Lex is unable to form any real attachments with those around him and will do anything to complete his goals, and according to Lena, Lex has always been a psychopath, and is incapable of truly empathizing or caring for anyone. Lex shows this by manipulating Red Daughter and attempting to murder a child, the one person she cared for most, just to get her to start a war with Supergirl. Lex is (seemingly) incapable of truly caring for anyone and uses those around him for his own means, which he is very good at disgusing as caring.

Powers

 * Lexosuit application: Lex is masterful in using his Lexosuit, a battle armor he created to suit his needs and protect himself against Kryptonian-level threats.

Former powers

 * Harun-El mutation: Lex had given himself the Harun-El cure in order to save Red Daughter from Harun-El withdrawal, by transferring the cure to her through a blood transfusion. By doing so, he acquired the following abilities:
 * Cancer immunity/resistance: The Harun-El mutation allowed Lex to cure his self-inflicted cancer.
 * Regeneration: The Harun-El allowed Lex to regenerate to full health from his self-inflicted cancer.
 * Superhuman strength: Under the Harun-El's effects, Lex was able to achieve great strength. Being able to lift the Daily Planet globe, and smash it under Supergirl.
 * Superhuman durability: Lex was able to block a punch from Supergirl with a small amount of struggle.

Abilities
"How do you think I did it? I'm Lex Luthor!"

- Lex Luthor to Supergirl


 * Genius-level intellect/Great business acumen/Master tactician/Leader: Lex Luthor's intelligence is nearly unrivaled, even among the highly notorious Luthor Family. A nearly flawless planner, able to assess and account for the numerous variables and from this effectively manipulate the situation to unfold as he sees fit, Lex is also an exceptional tactician, leader and businessman, as in addition to being among the greatest CEOs of Luthor Corp, his intellect having been more than enough to successfully oversee for years it's daily activities and maintain it's status as a multi-billion dollar corporation, he successfully set up hideouts all around the world and led his minions in it to collect weapons successfully in secret to defeat Superman or any sort of aliens-related threat. His immense intelligence and strategical abilities were seen in his years-long war with the the tremendously powerful and notoriously intelligent Superman, as he was able to stalemate him with many complex plans, plots and attacks against him, although in the end Clark proved to be slightly more intelligent and ultimately defeated and exposed his true nature to the public. He was also able to efficiently and patiently program his escape from prison despite his failing health, infiltrating Eve Teschmacher at Lena's side to get her research, having himself placed under house arrest in his mansion, curing himself from his disease, effortlessly kill his handlers with the mansion's secret defenses and finally escaping by helicopter, catching his extremely intelligent sister completely off-guard, proving he is more intelligent than her. He may be the second most intelligent individual on Earth-38, with (apparently) only Superman being able to rival or surpass his intellect. Lex was personally trained in playing chess by grandmaster Anatoly Karpov, and was able to transfer his knowledge to dim-witted inmates to teach them to achieve checkmate.
 * Master of deception/Manipulator: Lex is exceptionally talented in the art of deception, as he is able to fool and convince many others of his agenda, even if they're even experts of seeing through deception and extremely intelligent, to the point that he was able to keep up the façade of being merely a normal person of extreme intelligence and a famous CEO of Luthor Corp while simultaneously fighting Superman to a long standstill, only being exposed as a criminal after Superman defeated and revealed his crimes to the public. His great proficiency as a deception was so great that even Superman, despite his exceptional perception, was fooled into trusting him for years, although Lex was still not flawless as Superman was eventually able to see through his true nature.
 * Master scientist: Lex has a great aptitude in the field of chemistry; for example, he was able to inject himself with Green Kryptonite and to understand Lena's research on the Harun-El with ease, despite the fact that it took her months to study it. Lex is also an extremely capable biologist and is considered among the greatest living experts on Kryptonians, having studied them intensively due to his obsession. His mastery regarding said aliens it's acknowledged even by various governments over the World.
 * Master engineer: Lex is a brilliant inventor, specializing in various scientific fields. An extremely talented engineer, he was able to create advanced devices such as an "earthquake machine" that triggered a fault line in California, a device to turn Earth's sunlight red, a warsuit to argument his physical attributes and many other weapons. Lena herself admits that Lex outshines her in some fields of engineering.
 * Medical knowledge: Though he was never explicitly stated to have an M.D. or doctorate, Lex demonstrated satisfactory resourcefulness and remarkable knowledge in the medical field as he was able to made a correct diagnosis on his condition, as well as to cure himself.
 * Computer specialist/Master computer hacker: Lex was able to create a miniaturized computer into his watch and use it to take control of various complex devices such as Luthor Corp's and his mansion's security systems.
 * Multilingualism: Lex is capable of fluently speaking English, Latin, and Kaznian-dialect Russian. He can also write and read Kryptonese.
 * Artistry: Lex is an incredibly skilled painter, despite considering it "mere geometry".
 * Indomitable will: A driven and determined person, Lex is nearly fearless and almost never gives up, as proven by his lifelong feud with Superman.
 * Expert hand-to-hand combatant/Martial artist: Lex is very accomplished in close combat, as while wearing his battle armor, which gives him the necessary physical powers needed to combat a Kryptonian, he proved to be able to single-handedly compete against the highly proficient Kryptonian fighter Superman. Although despite being able to put up a fierce fight to the point of stalemating the superhero many times, he is (seemingly) ultimately slightly less skilled as his ex-best friend, as Superman was eventually able to best and incarcerate him in their final and presumably prolonged encounter.
 * Expert marksman: Lex is an expert in using firearms and was capable of shooting and killing a group of US Navy using a shot each.
 * Network: Lex has a dense network of information throughout the world; despite being in a maximum security prison, he maintain enough influence and connections to hire the professional assassin John Corben, as well as to orchestrate the assassination attempt of James Olsen, manipulate the government to have his sister work with the D.E.O., and to organize his escape from house arrest.

Weaknesses

 * Mental instability: Lex is extremely arrogant, erratic, cruel and unstable, believing himself intellectually superior to the rest of the world and the real "Man of Tomorrow", he grew to resent Superman's popularity with the public and his animosity against him eventually corrupted all of his personal relationships collapsed, including that with his half-sister Lena and his then-girlfriend Mercy Graves. He even went so far as to inject himself with Kryptonite to keep his obsession at bay. He is also very overconfident about his schemes and takes no further caution beyond his initial plans, greatly losing his temper if something happen beyond his expectations. The fact that Lex had not learned from Clark's ability to defeat him not only in direct combat but also outsmart and reveal his crimes to the public also shows that he cannot learn from his mistakes, as he still proclaims confidently to be the most intelligent individual in the world; even though his ex-best friend had proved to be equal, if not outright exceed, his intellect.

Former weaknesses

 * Failing health: After voluntarily locking himself in a radioactive chamber, Lex had a stroke and developed inoperable cancer, however, he was able to cure his condition; after hijacking his sister's research on the Harun-El.

Equipment

 * Lexosuit: Lex has created a high-tech battle suit, nicknamed "Lexosuit", which gave him enhanced strength, durability, flight, energy blasts and advanced weaponry, among other capabilities. He used it to better match Superman.
 * Watch: Lex always carries with him a special watch of his own invention with whom he is able to remotely control various devices.

Supergirl
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Season 4
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Trivia

 * In the show, it's strongly implied that Lex's baldness is an inherited trait which he gained from his father instead of something caused by an accident as generally represented.
 * Lex and Superman once being best friends is likely a reference to the TV series Smallville, which started with Lex and Clark being best friends and the duo eventually developing the classic animosity between Superman and Lex Luthor.
 * Interestingly enough, this is the first live-action adaptation of Lex Luthor with facial hair.
 * Lex having an inoperable cancer after injecting himself with Kryptonite is a reference from the original comics, where he discovered that Kryptonite radiation was deadly to humans (if not quite so fast-acting as it is with Kryptonians) after he began wearing a Kryptonite ring to keep Superman at bay and later developed cancer.
 * In the flashback at the beginning of ​​​​​​, Lex turned Earth's sunlight red in a bid to depower Superman, this is a nod to the War of the Superman storyline of 2010, when he briefly turned the sun red to save Earth from an invasion of hostile Kryptonians.
 * Having killed millions of people during the years of his war against Superman, as well as dozens of FBI agents in his first physical appearance, Lex is arguably the main villain with the highest body count on the shared multiverse, alongside Vandal Savage.
 * Lex Luthor is the third known human capable to understand Kryptonese after Winn Schott and Thomas Coville.
 * In ​​ it was mentioned that Lex was named after Alexander the Great, a reference from the comic books.
 * Lex Luthor shares with Reign that they both wanted to murder their mothers. However, while Reign succeeded in killing Patricia Arias, Lex has not succeeded because Lena Luthor warned Lillian.

Behind the scenes

 * Lex Luthor first appeared in Action Comics #23 (April, 1940) and was created by Jerry Siegel and Joe Shuster. He is considered to be the intelligent and ruthless archenemy of Superman. He usually appears as a brilliant scientist and sometimes corrupt billionaire industrialist, with a personal vendetta against the Man of Steel. Even though he has always been a controversial figure in the public eye, he has also maintained political popularity, once serving as the President of the United States.
 * Lex's act of creating an earthquake in California is a reference to the original 1978 Superman film, where Luthor's master plan was to use the quake to sink the west coast and turn the near-worthless desert real estate he'd bought up into a valuable water-front property.
 * Jon Cryer also portrayed Lex Luthor's nephew, Lenny Luthor, in the 1987 DC film, Superman IV: The Quest For Peace, which is widely regarded as the most disappointing Superman movie ever.
 * According to Cryer himself stated that the film’s less than sterling reputation was half the reason he accepted the role, alongside his love of the first Superman movie and the comics, as he wanted the opportunity to do the Luthor name justice.
 * Lex Luthor is the hidden main antagonist of the fourth season of Supergirl.