Chaos is an Esper is located in the Necrohol of Nabudis, in the Cloister of the Highborn. He was sealed following the Battle of Nabudis by a group of nu mou wielding powerful magicks, trapping him in a physical location in addition to the spiritual binding the gods had already placed on the Espers. The nu mou binding has weakened over time, and they search for people brave enough to defeat the Esper. To find Chaos, the player needs to collect three medallions and defeat two optional bosses, Fury and Humbaba Mistant. Chaos's license costs 90 LP, and he requires three Mist Charge to summon.