Fantasy

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"
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Extra Tags: #cultivation #magic #apocalypse #elements #Romance #violence #Dragons #elves #pheonixes #beasts #bloodlines #bloodboiling #weak to strong #demons #demonhunting #multiverse #universe #cheats #fastpaced
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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.