Witch Doctor

The Witch Doctor is an NPC vendor that will spawn once the following criteria have been met: In order to purchase some of his items his house must be in a Jungle Biome. Alternately, you can create an artificial Jungle Biome. Lining the floor and roof of a fairly spacious room with mud blocks and Jungle Grass Seeds, then letting vines and grass grow can achieve this fairly easily.
 * There is an empty House.
 * You have killed Queen Bee.

Items sold
Once the Witch Doctor has moved into a house, he will sell the following:

Quotes

 * "Which doctor am I? The Witch Doctor am I." (Possibly a reference to Doctor Who, but more likely referencing "Who's on First" scenarios)
 * "Choose wisely,[Name of Character], my commodities are volatile and my dark arts, mysterious."
 * "[Name of Nurse] may heal your body, but I can make you embody healing." (Only if Nurse is present)
 * "The heart of magic is nature. The nature of hearts is magic."

Names
The Witch Doctor may have any of the following names: Abibe, U'wa, Kogi-ghi, Xirigua, Zop'a, Opuni, Jumandi, Gboto, Konah, Tairona.

Trivia

 * The Witch Doctor appears to have green skin and a tail, so it is possible that he's a Lihzahrd.