Affinity is a creature swarm deck (Refurbished Familiar, Utrom Monitor, Kor Skyfisher, Glint Hawk) that also leans on artifacts like Cryogen Relic and Blood Fountain for card advantage, making Annul strong against their key artifact spells. Cast into the Fire's artifact-exile mode can remove a problematic Cryogen Relic or Blood Fountain, while its damage mode cleans up 1-toughness creatures like Baleful Strix and Refurbished Familiar. Spell Pierce is weak since affinity's costs are frequently reduced to nothing, letting them pay through the tax easily, so trim it along with Preordain for these proactive answers. Fiery Cannonade remains excellent against their small creatures and should stay in at full count.