Gruul Goblins is a fast tribal aggro deck that can go wide quickly with Goblin Lackey, Goblin Piledriver, and Goblin Warchief, making it dangerous if they stick an early threat. Earthquake is your best sweeper here, capable of clearing their entire board of small goblins while your Ball Lightnings and Fireblasts close the game from above before it resolves damage to you. Cursed Scroll comes out because it is too slow against their aggressive curve and requires a near-empty hand to function well. Your burn suite of Lightning Bolt, Incinerate, Seal of Fire, and Mogg Fanatic lines up favorably against Mogg Fanatic and the smaller goblins, while Grim Lavamancer can pick off Goblin Lackey before it connects. Prioritize killing Goblin Lackey and Goblin Warchief on sight, as Lackey's triggered ability and Warchief's cost reduction enable their most explosive draws.