D'Sparil

D'Sparil is the final boss of Heretic, and is boss of Episode 3: The Dome of D'Sparil. He is also the first and the youngest of the trio of Serpent Riders, relying a lot on cunning and deception to initally gain dominance of Parthoris, the world of Heretic.

The player as Corvus, fights D'Sparil in a wide arena with a large trident-shaped ledge in the upper-middle, and various teleporter destinations scattered around the map. D'Sparil initally is seated upon a Chaos Serpent, which are more seen in Hexen. The Serpent is the most powerful of any Chaos Serpents in the series itself, able to belch fireballs, at first in single units, and then after falling below half its Health, shoot a line of three scattered fireballs at the player. The Serpent can also make a bursting charge of speed towards the player when stunned by attacks.

When the Serpent dies, D'Sparil will electrify and rise up, and start attacking the player. However his abilities are a mix of offensive and defensive attacks, one being to shoot a pair of rings which turn into Disciples of D'Sparil. He can also fire a blue, trailing bolt of electricity for extreme damage to unarmored players. D'Sparil also has the ability to teleport to 5 or 6 specified locations in the area, which are actually preset landing points. As he is damaged more, he will teleport more often. When D'Sparil finally dies, he explodes into a pile of bones in a burst of electrical energy, all the other enemies on the level will instantly die, and the portal to the end of the third episode will be revealed.

D'Sparil's entire fight is 5500 Hit Points; 2000 Hit points for the Chaos Serpent, and D'Sparil himself having another 3500 Hit Points.

The demonic incantations of D'Sparil are actual phrases recorded backwards:
 * SORSIT - "I will torture your flesh" (The first words are somewhat unclear, but "I will" seems reasonable)
 * SORACT - "Surrender to D'Sparil"