Izzet Prowess is full of 1- and 2-toughness threats — Dragon's Rage Channeler, Monastery Swiftspear, Slickshot Show-Off — so Fire Magic cast as Fira for {2}{R} wipes their early board before Monastery Swiftspear grows out of control with prowess triggers or Delirium powers up Dragon's Rage Channeler. The extra Lightning Bolt gives another way to answer a Cori-Steel Cutter Monk token or a delirious Dragon's Rage Channeler. Cut Burning Inquiry since it's too risky to hand a spell-dense deck extra cards, and trim Ox of Agonas since this matchup rewards a low, efficient curve over a value creature that dumps your hand.