Grace Parker

Grace Parker, is a Kryptonian world killer known as Pestilence. In the 31st century, Grace is also known as Blight.

Biography
Grace as a baby was launched to Earth from Krypton when the planet exploded. At some point, she became a doctor in National City.

Possible future
According to Mon-El, in the 31st century, Grace has evolved and became the Blight who killed many people across Earth and countless other planets. The Legion traveled to the present while she was still Pestilence to prevent her evolution.

Personality
Unlike the other World killers, Grace does not have a split personality.

Powers

 * Altered Kryptonian physiology: While normally her capacities are no greater than a normal human of her physical conditioning, once empowered, Grace becomes able to perform a variety of otherworldly feats. Even more, Grace's Kryptonian physiology has been genetically augmented from centuries of experimentation by Kryptonian scientists. Due to this, her powers are naturally greater than any normal solar-powered Kryptonian. It is unknown if she is more powerful than Superman, but it is likely that she is just as powerful as he, as she has been on Earth for at least 35 years; the same number of years that Superman has spent under the Earth's yellow sun, but has augmented, much more potent powers, making Grace one of the most powerful beings in the multiverse. It has been implied by Mon-El; that Grace is the most powerful and deadliest of the Kryptonian world killers.
 * Extended longevity: According to Mon-El; after 1000 years, Grace will eventually evolve into "Blight", implying that she doesn't physically age or she does so, but at an extremely slower rate.
 * World killer link: The world killers appear to have a link with each other using Reign as a nexus point. This is evident as no world killers awoke until Reign did.
 * Flight: Grace has the ability of self-propelled herself through the air at tremendous hyper-sonic speeds. Though she has only been seen using this ability once, it is implied that she can fly at speeds as fast as Supergirl, and has been shown to be able to hover and levitate as another application of her ability to fly.
 * Super strength: Grace has demonstrated a high level of super strength, as she was able to Fight supergirl and Mon-El at the same time. It is unknown if her super strength is as powerful as Reign’s, but from her demonstrations of super strength, she is likely stronger than Supergirl.
 * Invulnerability: Grace was able to take multiple punches from Mon-El and Supergirl and still being able to fight back.
 * Pestilence inducement: As Pestilence, Grace can spread some kind of contagious virus that can kill any living thing she comes into contact with as seen when dozens of pigeons fell dead from the sky, when people at city hall started having nose bleeds before collapsing and when a plant immediately died upon being touched. According to Mon-el, it is 100% fatal.
 * Evolution: As Pestilence, Grace can ‘evolve’ into more powerful and potent forms of herself, including turning into diseases and creating new ones. As shown in the 31st century, Grace has evolved into most powerful known form of herself, the Blight.

Abilities

 * Expert combatant: As Pestilence, Grace is able to show skills in close-range fighting as shown when fighting Supergirl, but was bested implying she is not as skilled as Reign or Purity, both who have been able to gain the upper hand on Supergirl.

Trivia

 * In the DC comics, the Blight is a nomadic race of techno-organic beings, who assimilate new races in search of immortality, but turning everyone into perpetually decaying techno-zombies in the process.
 * Pestilence's DC Comic counterpart may be Perrilus who was a Worldkiller from the Supergirl New 52 comics who also had the same abilities to creates plagues and diseases.