Kul Ultim

The Kul Ultim is the fifth boss in the new raid in Patch X-20: Prelude to the Rise. It is a powerful, sentient entity that uses "immoral" powers, prowess and abilities. At one point it lied in Death'kul. Rumors speculate it is the source of evil for the land, being highly malevolent.
Shadius has described the battle as a "brutal" battle for survival, and one of the harder encounters.