Agiel (Hebrew: אגיאל) lord of calamity, The Intelligence (beneficial spirit) of Saturn mentioned as a Spirit in such works as the Key of Solomon. As it says on the 10th Plate: "The First Pentacle of Mercury.--It serveth to invoke the Spirits who are under the Firmament.". And the letters forming the names of the Spirits Yekahel and Agiel. He is also described as being the presiding spirit of the planet Saturn, with Zazel.
Agiel is a demonic spirit and a soldier in Satan's army. His presence can be detected by signs of extreme violence on the battlefield. Agiel has the ability to invoke spirits that live in the firmament of the earth. He does not necesarily have dominion over fellow demons Asmodai, Elubeb, and Haniel as he does the planet Saturn, but he has long been associated with them. It has been alleged that Agiel's name was engraved on a talisman that belonged to and was worn by Catherine de Medicis, Queen of France (April 13, 1519-January 5, 1589).