Heart of the Archangel

(Before anything please join my discord to get bonus chapter, spoilers, if you just wanna role-play or mingle with other novel lovers. Join this link- https://discord.gg/PEtXy54M ) WARNING ( its a multiple POV story) Long ago an archangel give humans his heart as a gift and the humans took it but this heart wasn't as it seems. Right after the whole world was drained off all life an nothing survived. However the archangels heart was still beating, as the ways of humans they took it and created a new civilization within walls. But that's just the story they have been told. Is it true?