Izzet Prowess relies on colorless spells like Mishra's Bauble, plus many blue spells (Preordain, Expressive Iteration), making both Consign to Memory and the discounted Mystical Dispute strong picks. Spell Snare answers their two-mana threats (Slickshot Show-Off, Cori-Steel Cutter). Day's Undoing is disastrous here since it refills the hand of a low-curve aggro deck that wants cards more than you do, and Prismatic Ending is often too slow against their hasty low-cost creatures compared to your cheap counterspells. Galvanic Discharge and Solitude remain crucial to answer their small creatures and Dragon's Rage Channeler.