Gift of Doom is a rare Enchantment — Aura card from Commander 2019 (C19), collector number 17. Current market price: $4.55, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature has deathtouch and indestructible. Morph—Sacrifice another creature. (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) As this Aura is turned face up, you may attach it to a creature.