The Seventy-first Spirit is Dantalion. He is a Duke Great and Mighty, appearing in the Form of a Man.
The Goetia is the first book of the 17th century grimoire, The Lesser Key of Solomon, which was translated into English by SL MacGregor Mathers in 1904 and later used extensively by Aleister Crowley. The Goetia provides a catalog of 72 demons that can be summoned to do one’s bidding. Read articles about the Goetia below.