Existence

Existence is a Korean manhwa created in 2022 by Gwang-Jin and Kim Kyungjun. It is a story about Lee Ja-in, a human who has the power of every creature he has ever reincarnated as. He has lived tens of thousands of reincarnations and lives as various kinds of animals and plants, every time died by the hands of humans. He doesn't know why every time he dies gets reincarnated with the memories of previous lives, and he develops hate and agony for the whole mankind. The time he gets reincarnated as a human, he has the power of everything he has lived as. He was born with the purpose of eradicating humans, however, in his life as a human, he began to meet people who made him feel emotions. His mom loved him so much, although every other single person used to call him abnormal and a freak, as he never spoke for years, nor showed any facial expression. After so many years he started to feel love and care for his mother, but she was killed by few men in order to protect him. 

The fatherless child lost his only love and was raged and killed every single killer at the spot. Then followed by the troops he found shelter in the house of an adult man and his old mother. They loved, fed and took care of him, but later they were also killed. Then the kid who had an ounce of emotions became heartless and decides to destroy the annihilate every single human and thus goes on accumulating all his power by meditating for so many years. And after many years, when he comes out of the meditation, he was ready to destroy the world, but was struck by a car and loses his every memory. He could have easily protected himself, but the girl who struck him resembled his mother and he was unable to move dwelled in emotions. After losing memories, the girl takes care of him and he falls in love with her protecting her from every danger in the world. He fights with the whole world, every government and military which were influenced by a particular virus "steer". In the end, the girl also gets infected and the virus makes her his host and the protagonist kills the virus with himself, protecting the girl who resembled his mother and the second person in his whole life whom he loved. And this was the only time he didn't get reincarnated. What an irony ! He was born to wipe the humanity's existence, but died as an hero protecting it.