Affinity builds a board of cheap artifacts to power out Kappa Cannoneer and Pinnacle Emissary, which quickly become unmanageable threats with protection and counters. Kataki, War's Wage is your best disruption — it taxes every artifact per upkeep, forcing difficult sacrifice decisions that either strip their board or drain their mana, and it pressures Mox Opal, Mishra's Bauble, and their Urza's Saga tokens simultaneously. Wear/Tear handles Mox Opal cleanly and can answer Engineered Explosives before they use it as a sweeper against your token-light board. Path to Exile and Galvanic Discharge handle individual threats, but Kataki changes the entire texture of the game by making their free artifacts cost real mana. Mana Tithe is poor since Affinity generates multiple mana sources early; Soul Partition is too slow against their aggressive tempo starts.