Goblin Dark-Dwellers [Oath of the Gatewatch]

Set: Oath of the Gatewatch Type: Creature — Goblin Rarity: Rare Cost: {3}{R}{R} MenaceWhen Goblin Dark-Dwellers enters the battlefield, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.