Originally Posted by Alisae
For the most part, living things are composed of aether of various types. But when exposed to [the Flood of Light], their aetheric harmony is shattered, and their natural form breaks down. Then they either perish... or are warped into mindless abominations. Yes, that's how the sin eaters came to be. ... But even that is not the worst of it. The stronger sin eaters can plant Light in us like seeds in soil, corrupting our aether, and triggering the birth of new monstrosities.