Goblin Dark-Dwellers (Buy-A-Box) [Oath of the Gatewatch Promos] Special Rainbow Energy you may pay {2} and

you may pay {2} and exile it from your hand face down

It remains unexplored

Set: The List Type: Legendary Creature — Spirit Rarity: Rare Cost: {4}{R}{R} Goblin offering (You may cast this card any time you could cast an instant by sacrificing a Goblin and paying the difference in mana costs between this and the sacrificed Goblin

it gets +3/+0 and gains haste

"Do as I think

Goblin Dark-Dwellers (Buy-A-Box) [Oath of the Gatewatch Promos] Special Rainbow Energy you may pay {2} andSet: Oath of the Gatewatch Promos Type: Creature Goblin Rarity: Rare Cost: {3}{R}{R} Menace When 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.