Izzet Spellementals reduces the cost of Eddymurk Crab through cheap spells, but most of their support creatures (Sunderflock aside) die to a 2-damage sweeper before they get out of hand, so Pyroclasm is strong early. Voice of Victory denies them Spell Snare, Get Out, and other cheap interaction on our turn, letting our threats resolve cleanly, while Origin of Metalbending can save one of our key creatures from their removal suite. Lost in the Maze taps down only a couple of their many threats and North Wind Avatar is too slow against a tempo-oriented opponent, so both come out along with the weaker damage mode of Prismari Charm. Watch out for a fast Eddymurk Crab or large Hearth Elemental and prioritize removing them.