Boros Aggro wants to flood the board with cheap creatures like Momo, Sarkhan, and Voice of Victory, whose Warrior tokens attack for a turn and are sacrificed at the end step. Fire Magic's Fira or Firaga modes sweep away their smaller creatures efficiently, though the damage wears off at end of turn, so it won't finish off their 4/5 Dragons without help. Duress strips removal like Burst Lightning or Erode before it can be used against our control plan, buying crucial tempo. We cut Consult the Star Charts since this matchup is about surviving aggression rather than grinding card quality, and Firebending Lesson's single-target mode is too slow against their wide board. Keep Deadly Cover-Up in as a critical answer to their creature-heavy board, including Clarion Conqueror and their Dragons.