Heresiarch

The Heresiarch is a boss enemy from Hexen. The Heresiarch is incredibly difficult, even more so than Korax himself. It is found at the end of two hubs: Heresiarch's Seminary and the Castle of Grief.

The Heresiarch is incredibly difficult for a reason. At all times, it has three cubes hovering over it's head in a circular pattern. When the Heresiarch prepares to cast a spell, the cubes rotate faster. Even if the player were to hurt the Heresiarch, the spell does not stop, unless the Heresiarch tries to use another spell.

The Heresiarch can cast spells that can do the following:

Cast a barrier that makes it invincible and projectiles are deflected. Shoot a set of many fireballs in a wavy pattern. Summon two skulls that bounce along the floor and home in on the target. When it's nearly dead, will also summon Dark Bishops.

For players using Baratus (the Fighter) or Daedolon (the Mage), the Heresiarch can be hard to kill. However, players using Parias (the Cleric) can kill the Heresiarch easily by spamming gas clouds (using Flechettes) on the Heresiarch. The gas clouds hurt the Heresiarch even when it has it's barrier up!

When the Heresiarch finally dies, the cubes that were circling around it's head will fall to the flood and bounce a couple of times. Despite the look and size of the explosion sprites for the cubes, the explosion radius is way bigger than that.