The Witch Doctor is a new enemy introduced in Spelunky 2. They can be very devastating to the overall longevity of a player's run.
They appear to be Cavemen wearing dark purple skull headdresses who have mastered the art of black magic.
When observed from a distance, they will walk around aimlessly, and will have a small skull that orbits around them through blocks. This skull is illuminated in dark levels and sub-areas.
As the player approaches them, the skull will start to slowly drift towards them. If the skull is able to touch the player, it will deal 1 damage and also inflict curse. The skull will continue following the player as long as they do not get out of its range, regardless of distance from the Witch Doctor it originated from.
If the Witch Doctor is stunned or killed, the skull will momentarily disappear. If it wakes up from being stunned the skull will reappear.
If the player happens to be directly in front of the Witch Doctor and within it's attack range, they will hold an effigy in one hand, and stab it with a pin, dealing damage to the player and stunning them for a long time. This happens after a short charge time, and can only be cancelled by stunning/killing the Witch Doctor. During the charge time, a small skull icon appears above the player's head.
After meeting a fellow Witch Doctor, Tiki Man, or Caveman, they seem to exchange a few words, with the Witch Doctor's words consisting of soft groaning and moaning. After enough time is passed or one is interrupted, they return to their standard behavior.
Witch Doctors are worth twice as much as normal enemies at an Altar, worth 4 favor when sacrificed live and 2 favor when offering the corpse of one.