Cosmic Brutality

This is a double crossover, One Punch Man, Demon Slayer, and the Dark Tower. The protagonists of these stories' main enemy is Apotheo-a being that is capable of destroying the entire universe and rebuilding it with it's own power. STORY IS ALSO ON WATTPAD /story/311266900-cosmic-brutality?utm source web&utm medium email&utm content share myworks