Early in the fight, Xevozz will summon three spheres. The spheres have about as much health as Xevozz, so do not try to burn them down. Additionally, the spheres have a damage aura. If Xevozz gets close to a sphere, he will feed off its power and enrage - increasing his damage output considerably. Finally, if Xevozz has LOS to a sphere for more than a few seconds he will teleport himself and the party to it - immediately feeding on it and subjecting the party to the damage aura.