The Enigmatic Riddle-Master is a character from the fantasy series by Patricia A. McKillip. He is known for his ability to pose complex riddles that challenge the intellect of those who encounter him. His riddles often hold deeper meanings and are tied to the themes of knowledge, power, and destiny. In the story, the Riddle-Master serves as a guide and a test for the protagonist, Morgon of Hed. His presence adds an element of mystery and intrigue, as characters must decipher his riddles to progress in their journeys. The Riddle-Master embodies the idea that wisdom often comes through struggle and contemplation.