Boros Energy floods the board with cheap creatures, and Brotherhood's End's 3-damage sweeper mode kills Ocelot Pride, Ragavan, Seasoned Pyromancer, Ranger-Captain of Eos, and every Warrior/Cat token they generate, resetting the board after they overextend. Harbinger of the Seas turns their nonbasic lands (Sacred Foundry, Arid Mesa, Flooded Strand, Marsh Flats) into Islands, cutting off the red and white mana they need for Galvanic Discharge and their planeswalkers. Stubborn Denial is unreliable since we rarely have a 4-power creature online early against their fast starts, and Street Wraith's swampwalk is irrelevant against a Plains/Mountain-based deck. Keep Thoughtseize and Fatal Push to proactively strip Blood Moon and their key threats before they take over the game.