Affinity is a colorless-heavy artifact deck built around Urza's Saga, Kappa Cannoneer, and Mox Opal, making Consign to Memory's ability to counter colorless spells extremely potent since it hits their Mishra's Bauble, Mox Opal, and Tormod's Crypt. Engineered Explosives on zero efficiently wipes their 0-mana artifacts and token armies, while Toxic Deluge clears wide boards, and Mystical Dispute is cheap against their blue Metallic Rebuke, Emry, and Kappa Cannoneer. Force of Negation is too narrow against their low curve of many small threats, and Spell Snare/Sink into Stupor are less impactful than dedicated sweepers and colorless-spell hate; trim all three. Keep Fatal Push with Revolt enabled to answer Pinnacle Emissary and Orcish Bowmasters to pick off the 1/1 Drone tokens it creates.