Crocell

In demonology, Crocell (also called Crokel or Procell) is the 49th spirit of the Goetia, manifesting as an angel with a tendency to speak in dark and mysterious ways. Once a member of the Powers, he is now a Duke of Hell who rules over 48 legions of demons. When summoned by a conjuror, he can teach geometry and other liberal sciences. He can also warm bodies of water, create the illusion of the sound of rushing waters, and reveal the location of natural baths. He is associated with water.