Demon Lord: Start by Assimilating Billions of Creatures

[Time Travel + No Heroine + Ruthlessness + Revenge + The Darkness of Human Nature + Leave the Virgin Not Disturbed] In order to avenge his parents, Xiao Tian dropped out of school and worked as an assassin for two and a half years. During the assassination process, his life was in danger due to an accident! The system appeared, and Xiao Tian was transported to a parallel world and became a slave. Only one of 100 slaves could survive. Xiao Tian awakened the demon king, infected all mankind, and ruled the world to become the overlord. Goldfinger: Teleport to a parallel world, destroy the value to extract treasures! Demon Lord: Each time you level up, you can awaken a skill!