Amulet of the Underworld

Hades, God of the Underworld costs {1} less to
cast.
When Amulet of the Underworld enters the battlefield, if it's on the battlefield, it becomes an equipment with "enchant creature put onto the battlefield with Necromancy." Put target creature card from a graveyard onto the battlefield under your control and attach Necromancy to it. When Necromancy leaves the battlefield, that creature's controller sacrifices it.