God Art is an ancient power that only the strongest could wield. This art was so insanely strong, strong enough to where it could destroy planets. People that contained God Art were considered Gods and were worshiped by normal humans.
But having this power had negative side effects. If careless, the power would consume the person, leading them to insanity. It's known that everyone who has obtained God Art lost their minds and became power hungry; they craved for more and more power. These people were then considered Lost Souls and the art inside of them needed to be sealed away.
This sealing technique came with a price though. The person performing the technique would lose their life in return to save a population, to save the world from a possible hell. Once sealed away, both the sealer and the God would die but the Gods power would be sealed into the scroll until opened by another.