In a magical context, the term "magic square" is also applied to a variety of word squares or number squares found in magical grimoires, including some that do not follow any obvious pattern, and even those with differing numbers of rows and columns. They are generally intended for use as talismans. For instance the following squares are: The Sator square, one of the most famous magic squares found in a number of grimoires including the "Key of Solomon"; a square "to overcome envy", from "The Book of Power"; and two squares from "The Book of the Sacred Magic of Abramelin the Mage", the first to cause the illusion of a superb palace to appear, and the second to be worn on the head of a child during an angelic invocation: