(Chaos V) Armageddon Ouroboros

Lore
Although defeating Ouroboros itself is impossible, there is one way to avert utter destruction. That is to cut off its tail before it can reach it.

Acquisition
Evolve Hell Marquis Kimaris with Kimaris' Diary Page four times.

Name origin
The Ouroboros is an ancient symbol depicting a serpent or dragon eating its own tail.