torture them and make them fear him
Hades
Hades had a "cap of invisibility." The Helm of Hades made the wearer invisible to both gods and mortals.
Hades and all other gods get their power from prayer from mortals on earth
The helmet of invisibility, metals, or jewels. Sometimes, mortals would sacrifice black sheep to Hades.
Hades rules the Underworld, where the souls of dead mortals dwell.
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.
Hades most famous symbol is his helm of darkness. The helm lets Hades become the dark or shadows and strike fear into the hearts of mortals.
Hades, the immortal god of death, was always remote in the Underworld - for the immortals of Olympus did not feel death as mortals do.
Hades doesn't kill Gods. And he would rarely personally kill mortals unless they crossed him. He is the God of the Dead, and Lord of the Underworld, not some ruthless bloodthirsty creature. He is actually very just.
He did not interact with living mortals on earth; he ruled the dead.
it is a way to explain the punishment of evil people.
Hades does not venture very often from the Underworld where he rules, he had kidnapped Persephone as his wife but was not often interested in the affairs of mortals or events upon earth.