Mordenkainen is a fictional character from the Dungeons & Dragons (D&D) role-playing game, created by Gary Gygax in the 1970s. He is a powerful wizard known for his intelligence and mastery of magic. Mordenkainen is often depicted as a neutral character who seeks to maintain balance in the multiverse, making him a significant figure in various D&D campaigns. Mordenkainen is also associated with several spells and magical items, including the famous Mordenkainen's Sword and Mordenkainen's Magnificent Mansion. His lore has expanded over the years, appearing in various sourcebooks and adventures, contributing to the rich tapestry of the D&D universe.