Evil sorcery:

The houngan and mambos confine their activities to "white" magic which is used to bring good fortune and healing. However caplets (also known as bokors) perform acts of evil sorcery or black magic, sometimes called "left-handed Vodun". Rarely, a houngan will engage in such sorcery; a few alternate between white and dark magic.

One belief unique to Vodun is that a dead person can be revived after having been buried. After resurrection, the zombie has no will of their own, but remains under the control of others. In reality, a zombie is a living person who has never died, but is under the influence of powerful drugs administered by an evil sorcerer. Although most Haitians believe in zombies, few have ever seen one. There are a few recorded instances of persons who have claimed to be zombies.

Sticking pins in "voodoo dolls" was once used as a method of cursing an individual by some followers of Vodun in New Orleans; this practice continues occasionally in South America. The practice became closely associated with Voodoo in the public mind through the vehicle of horror movies.