The Helmet of Darkness.
The Underworld was given to Hades as his reign.
It was given to him by his parents.
Zeus got the earth, Poseidon the sea, and Hades the underworld.
The Greek God Hades was given a helmet from the Cyclops to help defeat the Titans. The term "Hades" means "Invisible Man."
Hades was born before time existed.
He was given the role, just as Zeus and Poseidon were given the roles they have.
In myth, it varies, either it was his birthright as the eldest son; or he won that realm in a game of chance (lots, or dice) between his brothers.
Hades was Zeus's brother, Hades was given the underworld, Zeus the Sky and Poseidon (the third brother) the sea. they did not get along but there was never a vendetta or anything like it, Hades was passive rather than evil.
Hades is given as a god for the living to be wary of - all mortals die - but he was a god that favored avenging justice.
Ever since it was given to him as his dominion.
Queen of the Dead, Goddess of the Underworld, Queen of Hades.
The Helm of Invisibility, given to him by the cyclops for the Titan war.