The spells of Dungeons & Dragons are fictional magic spells used in the settings of the role-playing game, Dungeons & Dragons (D&D). There is little if any similarity between these fictional spells and any actual historical mythology. D&D defined the genre of fantasy role-playing games, and remains the most popular. Many of the original spells have become widely used in the role-playing community, across many different fictional worlds, and across books, board games, video games, and movies.