According to the tenets of Vodoun, a dead person can be revived by a bokor or Voodoo sorcerer. Zombies remain under the control of the bokor since they have no will of their own. "Zombi" is also another name of the voodoo snake god Damballah Wedo, of Niger-Congo origin; it is akin to the Kongo word nzambi, which means "god." There also exists within the voudon tradition the zombi astral which is a human soul that is captured by a bokor and used to enhance the bokor's power.