Mono-Red Rally can kill on turn three through a Burning-Tree Emissary chain into Rally at the Hornburg, so your sole job game one is to hold up Counterspell or Skred every turn and never let the board grow unchecked. Breath Weapon is critical here — it clears the wide boards of Voldaren Epicures, Goblin Tomb Raiders, and Clockwork Percussionists that Rally needs to generate lethal damage, and you should hold it for the turn before they untap with a full board. Hydroblast counters Galvanic Blast, Rally at the Hornburg, and Lightning Bolt, covering both their removal and their kill spell. Dispel, Bonder's Ornament, Union of the Third Path, and Late to Dinner are too slow and reactive for a matchup where the opponent can empty their hand by turn two.