Setting: The ancient Heavenly Court collapsed, becoming nine “corpses of ancient gods” that blotted out the sky and sun as they floated in the void of the universe. Humanity lives upon the organs and bones of these corpses, absorbing the “divine essence” they emit to cultivate.
Crisis: The corpses of the ancient gods are “rotting,” and their divine essence is tainted with “corpse poison.” Those who cultivate to the utmost often mutate into monsters, a process known as “corruption.”
Power system:
Relic Gathering Realm (absorbing spiritual energy from the surface of the corpses)
Bone Excavation Realm (unearthing the divinity deep within the bones)
Blood Exchange Realm (the blood is assimilated by divinity)
Organ Realm (transplanting organs of ancient gods to gain supernatural abilities)
...Later realms involve a struggle over souls and laws.