Grace Parker

Grace Parker, was a Kryptonian Worldkiller known as Pestilence. In the 31st century of an erased timeline, Grace was also known as Blight. Because the Legion altered the timeline, she died in 2018 and never became 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.

Death
After Supergirl and the Legion found the Worldkiller Fortress, they fought. The Worldkillers were winning until Purity controlled by her human form turned on them. Pestilence killed her but not before being killed by Purity herself. After her death, her and Purity's powers were absorbed by Reign who escaped after the fortress collapsed.

Erased future
According to Mon-El, in the 31st century, Grace has evolved and became 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 Worldkillers, Grace did not have a split personality. She did have two people living inside one body, however, they just happen to be similar people.

As a civilian, Grace gives out an outward show of empathy, but she was really enjoying hurting people. Once she found out about Pestilence, she was overjoyed, and started infecting others in her human form. It seems to be possible because the two may have made an agreement in the mind, however, Grace is also shown to be willing to give her life for her alter ego, Pestilence, as she stated that Grace gave up and shriveled without a sound.

Powers

 * Altered Kryptonian physiology: Grace's physiology was altered due to genetic experiments and dark magic from Kryptonian Polytheistic Witches. Normally Julia's capacities were no greater than a normal human of her physical conditioning, However, once charged by the energy of a yellow sun and metabolized into her body, she becomes able to perform a variety of otherworldly feats. Due to her dark magic enhancements, her powers were naturally greater than any normal solar-powered Kryptonian. It was said that she was born from Rao's fire. It was unknown if she was more powerful than Superman, but it was likely that she was just as powerful as him, as she had been on Earth for at least 35 years; the same number of years that Superman has spent under the Earth's yellow sun, but had augmented, much more potent powers, making Grace one of the most powerful beings in the multiverse.
 * 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.
 * Worldkiller link: The Worldkillers appear to have a link with each other using Reign as a nexus point. This is evident as no Worldkillers awoke until Reign did. While holding hands, they amplify each others’ powers, and can fire off a powerful blue blast.
 * 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. She has managed to take a punch from Reign who is implied to be the strongest Worldkiller.
 * 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 was 100% fatal.
 * Retractable claws: As Pestilence, Grace can grow her nails into yellow claws, sharp and dense enough to pierce Supergirl's invulnerable skin, and presumably any other being. Her claws can also induce pestilence when she grows her nails upon physical contact. Her nails are retractable, and can reform to normal size.
 * Evolution: As Pestilence, Grace can "evolve" into more powerful and potent forms of herself, including turning into diseases and creating new ones. As mentioned in the 31st century, Grace had evolved into most powerful known form of herself, 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.

Supergirl
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