Boros Aggro's early game runs on cheap threats like Momo, Friendly Flier and Voice of Victory, so Seam Rip is efficient one-mana exile removal against those mana value 2 or less threats before Sarkhan or the Hellkites arrive. Interdimensional Web Watch and Michelangelo's Technique are too slow against this aggressive curve and come out for cheap interaction plus Rest in Peace, which denies any incidental recursion value. Keep our flash creatures (Aang, Swift Savior; Appa) since ambushing attackers is crucial against a deck this fast. Prioritize stabilizing the board before turn 4-5 when their Dragons come online.