Chthonian Nightmare [Modern Horizons 3 Prerelease Promos]

Set: Modern Horizons 3 Prerelease Promos Type: Enchantment Rarity: Rare Cost: {1}{B} When Chthonian Nightmare enters the battlefield, you get EEE (three energy counters).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.