A guardian of the ancient Nerubian Kingdom of Azjol-Nerub, Crixalis fled to the deserts of Kalimdor in an attempt to escape the genocide of the Lich King. The harsh climate transformed this warrior into a master of the earth, able to tear the skin off his foes with vicious sand storms. Those unfortunate to succumb to his potent toxins are condemned to violently burst apart in a cloud of noxious fumes. Sensing his growing power, the Lich King sought out Crixalis and unable to sway him, slew him in battle. Summoned to aid the Undead Scourge, the heart of the Sentinel quivers each time the ground trembles beneath them.