The Gods Plan
The gods were at the moment very tensed up about the awakening of a primordial Demon. This could not be helped as they knew that a contender for power had risen.
The worse part of it all, was that the Leviathan family had a reputation of being cruel even to other demons. After all, unlike normal demons, the entire family had been gifted by lady death, granting them the undead status.
Legend had it, that if not for the will of the morningstar against them, that no blade could stop their never beating hearts. They were mystery of demonic lineage that would have been a tumor on all that is living.
There were many in the universe that assumed that this was just lady death's way of having a firmer control on beings that have a naturally longer life span as a result of their power and ability.
After all, the stronger one was, the longer, and better they could beat old age and danger.