Sauron's Mace is a black thorned mace wielded by Sauron, the primary antagonist from the Lord of the Rings novels and films.
Though the mace is not mentioned in the books, it appears in the first Lord of the Ring film based on the book. After Morgoth was defeated, his formerly loyal lieutenant, Sauron, became obsessed with the task of conquering Middle-earth. His attempts to brainwash Middle-earth's governors and rulers with the One Ring ultimately led to the War of the Ring. Sauron used his dark magic, One Ring, and mace to slaughter waves of elves and men, but was eventually defeated.