Crimson Acolyte grants protection from red, making it immune to Galvanic Blast and Lightning Bolt and able to shield another blocker each turn, which is crucial against a deck whose only real interaction is burn. This is a fast combo-aggro deck built to flood the board via Burning-Tree Emissary and win with a Rally at the Hornburg alpha strike, so our defenders (Overgrown Battlement, Axebane Guardian, Shield-Wall Sentinel) need to hold the ground as long as possible while we assemble a big finisher. Scattershot Archer is mostly a cheap blocker here since their creatures are mostly non-flying. Cut slower value pieces that don't help us survive the early turns, since this matchup is decided by whether we stabilize before Rally at the Hornburg goes lethal.