Chthonian Nightmare (Retro) [Modern Horizons 3]

Set: Modern Horizons 3 Type: Enchantment Rarity: Rare Cost: {1}{B} When Chthonian Nightmare enters the battlefield, you get EEE.Pay X E, Sacrifice a creature, Return Cthonian Nightmare to its owner's hand: Return target creature card with mana value X from your graveyard to the battlefield. Activate only as a sorcery.