This is a pure race where both decks goldfish fast, so we lean on cheap interaction instead of our weaker blockers. End the Festivities deals 1 damage to each opposing creature, which doesn't kill Guttersnipe or Kessig Flamebreather but does clean up their 1/1 and 2/1 bodies like Voldaren Epicure tokens, and more importantly it pings them for 1 to the face each copy. Relic of Progenitus can proactively exile their graveyard to deny Lava Dart's flashback, though it does nothing against Fiery Temper's madness since that's cast from exile, not the graveyard. Goblin Tomb Raider and Gingerbrute are the weakest attackers to trim since this matchup is decided by who runs out of gas first, not combat math.

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Affinity is an artifact-dense deck full of cheap creatures like Glint Hawk, Refurbished Familiar, and Utrom Monitor plus mana rocks, making Gorilla Shaman a premium answer since it can destroy noncreature artifacts of any size given enough mana, hitting things like Cryogen Relic or Nihil Spellbomb. Cast into the Fire is excellent as flexible removal, either picking off two 1-toughness creatures (Baleful Strix and Refurbished Familiar both die to it, while Kor Skyfisher survives at higher toughness) or exiling a key artifact threat outright. Keep Galvanic Blast in: it deals 2 damage, or 4 once we control three or more artifacts (our own Great Furnaces, Inventor's Axes, and Clockwork Percussionists count toward metalcraft). We trim slower, non-impactful cards like Gingerbrute, Wrenn's Resolve, and excess impulse-draw effects to make room for proactive interaction against their go-wide artifact plan.