Grixis Affinity is a red-black-blue deck but nearly every threat and support card is an artifact (Myr Enforcer, Refurbished Familiar, Utrom Monitor, Ichor Wellspring, artifact lands), making Smash to Smithereens a great two-for-one that removes a key piece and burns them for 3. Pyroblast and Red Elemental Blast stay boarded since this is a mirror-adjacent matchup where speed matters more than countering their blue spells (only Thoughtcast and Utrom Monitor are blue, so there are few good targets). Crimson Fleet Commodore's trample and monarch trigger help us out-grind their card advantage engine if the race goes long. Trim weaker looting effects since the games will be fast and artifact removal is higher-impact.