Witch Doctor

"Many believe that the Witch Doctors of the Umbaru to be legend, though their abilities suggest otherwise. They dispatch their opponents with terrifying precision, assaulting a victim's mind and body with elixirs and powders that evoke fires, explosions and poisonous spirits. In addition, the Witch Doctors have the ability to summon undead creatures from the Netherworld to do their bidding. The tribes of the Umbaru define themselves by their belief in the Mbwiru Eikura, which roughly translates to "The Unformed Land." This belief holds that the true, sacred reality is veiled behind the physical one normally experienced. Their vitally important public ceremonies are centered upon sacrifices to the life force that flows from their gods, who inhabit the Unformed Land, into this lesser physical realm. The Witch Doctors are finely attuned to this Unformed Land and are able to train their minds to perceive this reality through a combination of rituals and the use of selected roots and herbs found in the jungles. They call the state in which they interact with this other world the Ghost Trance."

- Abd al-Hazir

The Witch Doctor is one of the new character classes for the upcoming  Diablo 3. The Witch Doctor possesses several elements of previous Diablo II character classes, namely the Sorceress, Druid and especially the Necromancer.

He seems loosely based on the real-world Voodoo practitioners. The males are depicted as frail old men having a hunched back and always shaking their head due to their physical weakness. 

However, they possess great spiritual and manipulative powers as seen in the gameplay video. They can be seen easily controlling the minds of their enemies, raising the dead without the use of corpses and lobbing alchemical projectiles at unwary victims. 

The Witch Doctor is also the first shown character showing the new elemental damage type, Arcane. In keeping with his purple color-scheme, he is shown holding a sword imbued with Arcane damage glowing in a purplish glow.