William watched his family get slaughtered at the dawn of the Apocalypse. A demon placed his brother’s beating heart on his lap before death claimed him. For reasons unknown to him, he woke up inside a novel with a strange and powerful system bound to him. "For all the demons in existence, I will become their End" "And for those who brought apocalypse, I will become their apocalypse" ---------------------- Extra Tags: #cultivation #magic #apocalypse #elements #Romance #violence #Dragons #elves #pheonixes #beasts #bloodlines #bloodboiling #weak to strong #demons #demonhunting #multiverse #universe #cheats #fastpaced ————⁜⁜⁜⁜———— HAREM INFO: #no Yuri and no incest, not NTR, not all women will be part of MC's harem. Some heroins are obsessed with mc. Romance is not the main focus of the story.