Izzet Affinity is an artifact-dense deck built around Urza's Saga, Mox Opal, and artifact creatures like Kappa Cannoneer and Pinnacle Emissary, making Force of Vigor a premium answer that can two-for-one their Urza's Saga and a Mox or Seat of the Synod, and it can be cast for free on their turn by exiling a green card. Haywire Mite is another cheap answer to their noncreature artifacts, though it is a one-shot effect since it must be sacrificed to exile its target. Damping Sphere taxes their multi-spell turns and shrinks Ancient Tomb's mana, slowing their explosive draws. Witherbloom Command stays in because its destroy mode cleanly answers their many cheap noncreature artifacts like Mox Opal, the Baubles, and Lotus Petal. Instead we trim the slow Life from the Loam along with the narrow Pithing Needle/Skateboard/Nihil Spellbomb package. Keep Wasteland and Boseiju in since both punish their reliance on Urza's Saga and Seat of the Synod.