Gruul Sligh is a fast aggressive deck that aims to deal 20 damage quickly with cheap creatures like Jackal Pup and Mogg Fanatic backed by direct damage spells. Your main tools are Swords to Plowshares and Wrath of God to handle their creatures, and Infest can be especially punishing against their small-bodied threats. Bring in Warmth to offset their burn spells and Powder Keg as a flexible answer to their one-drops and Quirion Dryad before it grows out of control. Cut Haunting Echoes and the graveyard-hate pieces since neither is relevant against a deck that doesn't rely on the graveyard; Seal of Cleansing also has minimal targets here. Exalted Angel is a race-winning threat that gains life and flies over their ground creatures, so protecting it with Decree of Justice tokens as chump blockers can stabilize the game.