Affinity floods the board with cheap artifacts and artifact creatures, like Pinnacle Emissary and the Drone tokens it makes, so Brotherhood's End is the card we want. It is a choose-one spell, and the artifact mode destroys all artifacts with mana value 3 or less. That sweeps up Mox Opal, Engineered Explosives, Mishra's Bauble, Tormod's Crypt, Welding Jar, Pinnacle Emissary and Drone tokens in a single cast. It does not touch Kappa Cannoneer (mana value 6), so we can't rely on it for that threat. The other mode deals 3 damage to each creature and planeswalker, but it would hit our own Ral, so the artifact mode is usually the right pick. Galvanic Relay adds more spell volume to pressure their life total before Kappa Cannoneer (ward 4) becomes difficult to answer. Twinned Vision and Artist's Talent are slow and don't interact with their board, so we cut them for proactive artifact removal. Watch for their Metallic Rebuke, which can counter a key spell unless we pay 3. If they board in Consign to Memory, it can only counter colorless spells and triggered abilities, so our red spells are safe from it, but Ruby Medallion could be hit.