Do you want to compare Amethyst with Mastermind? Discover the powers, weakness & weapons of Amethyst and Mastermind from Amethyst Biography and Mastermind Biography. Find out all about Amethyst and Mastermind.# Check out how is Amethyst unique and distinct from Mastermind. Discover their love interest, sidekicks, family tree and the movies and games list in which Amethyst and Mastermind have appeared. Find out everything about them here!