The Vault of the Sentinel

The Vault of the Sentinel appears in the Elseer and is the location ofThe Empyrean Sentinel, as well as the game's final side quest's raid boss The Invincible Empyrean Sentinel

The map is a cylindrical arena, which begins with rocky crops on the outer part, which the player can hide behind and use as cover while fighting the first form of The Sentinel. When the Second form of the Sentinel appears the rocky outcrops disappear and the map as far as objects go is empty. During one of it's attacks The Sentinel will bring platforms from the ground at different heights and locations to provide the player safe haven from the ground attack that the Sentinel then performs seconds after the platforms rise, and disappear seconds after it's over. When the Sentinel is defeated a portal to the backside of the massive crystal that the entry is in will appear in the shape of a vault symbol.