Boros Dwarves floods the board with cheap 1-2 mana creatures like Dwarven Mauler and Iron Hills Blacksmith backed by equipment, so Pyroclasm's 2 damage sweeps most of their early board before it gets equipped up. Full Bore helps you race with trample and haste on warped-in threats. Poison Dart Frog's deathtouch ability trades favorably with their equipped bigger threats. We trim slower pump spells to keep pace in this aggressive mirror.