Izzet Affinity is a fast, low-interaction combo-aggro deck built around Urza's Saga and artifact synergies, so our discard suite of Thoughtseize, Cabal Therapy, and Unmask is mostly dead weight against their proactive plan — the priority is simply resolving a reanimation target as fast as possible and racing. Surgical Extraction is a useful catch-all against Tormod's Crypt or Aether Spellbomb hitting our graveyard, letting us fight back if they try to strand our Reanimate or Animate Dead. Chain of Smog can strip Force of Will pre-combo, but the real gameplan is going under them with Lotus Petal, Dark Ritual, and Shallow Grave into Griselbrand as early as possible. Trim the slower legendary threats since games are usually decided by turn 3-4 either way.