
Athena used the cap of invisibility during the Trojan War to assist Diomedes, Greek hero of the Trojan War, in injuring Ares. Perseus used the cap of invisibility on his mission to behead Medusa. Hades was no stranger to letting Greek heroes borrow his cap of invisibility.

Hades possessed the power of invisibility given to him through a magical helmet made by the cyclops. Greeks believed that if they spoke his name, Hades possessed enough power to bring them to the underworld, so Greeks would try not to speak his name. Hades lived in the underworld and could only hear the voices of those who lived in the underworld or those who spoke his name in the land of the living. Because he ruled the underworld, Hades did not reside on Mount Olympus with the other gods. Zeus drew the skies, Poseidon drew the seas, and Hades drew the underworld. Zeus, Poseidon, and Hades all drew lots to see which portion of the world they would control.


To decide this, the world was divided into three parts: the skies, the seas, and the underworld. When the Greek gods had defeated the Titans, they needed to decide who would have control over each portion of the world. Hades is the brother of Zeus and Poseidon, who make up two of the Twelve Olympians.
