One day, it was a herd of ants, and another day, it was a large dinosaur. This was the last reincarnation of a being that had experienced tens of thousands of reincarnations and lives. He was born as a human with the power of every single lifeform he had ever been. Why did he have such an ability? Lee Jain finally came to understand. “I exist to eradicate mankind.” Released 존재 Existence (Gwang Jin)