Zagan is a Great King and President according to the Ars Goetia and commands 33 legions of demons. His abilities include turning water into wine, wine into water and blood into wine. Although according to the Pseudomonarchia Daemonum he can transform blood into oil, oil into blood and a fool into a wise man. His other power is to transform a metal into a coin made from it (gold into a gold coin, etc.).
He is depicted as a griffin-winged bull that can turn into a man.