Hades, like all Olympians, was immortal. He could not die. He could be wounded or imprisoned, but he could not die. The only reason he lived in the Underworld was because when Zeus, Poseidon and...
Invisibility from the Helm of Darkness, a 2 pronged staff that he used to pin people down by the neck, many beings working under him of the supernatural kind like cerberus, the 3 kings, and harpies,...