Centaur

Centaurs are only featured in the novel, Soul of the Bride. They are magical beings with the upper torso of a man and a horse's body from the waist down. According to Greek mythology, centaurs are known for their wild tendencies and have a bad reputation.

History
A centaur was sent by Nikos to capture Phoebe Halliwell when she and her sisters went to the Underworld to save innocents. He carried Phoebe on his back and ran. Her sisters, Prue and Piper, were not able to catch up on foot, but Prue was able to scare it off by astral projecting in front of him in every way he turned. The centaur was finally scared off and ran away alone.