Izzet Affinity is a fast artifact combo deck that can pressure you with Kappa Cannoneer and Pinnacle Emissary while holding up Force of Will and Sink into Stupor to disrupt your gameplan. Their most dangerous hate pieces post-board are Disruptor Flute (naming Show and Tell or Sneak Attack) and Chalice of the Void on one (hitting Brainstorm, Ponder, and Lotus Petal), so you need to resolve your combo before these lock you out. Bring in Pyroblast to fight through their blue countermagic and Abrade to handle Chalice of the Void and Disruptor Flute on the stack or in play. Brotherhood's End comes in as a sorcery that wipes their artifact board including Mox Opal and Mishra's Bauble, buying time if needed. Flusterstorm is less effective here since they can often pay for it with artifacts, and Omniscience is a slower redundant threat that gets cut in favor of more interaction.