Dimir Aggro plays its own efficient tempo threats, and Scorching Shot is a clean upgrade over Burst Lightning to answer Sheoldred, the Apocalypse or a buffed Kaito, Bane of Nightmares creature form. Spell Pierce punishes their cheap interaction-heavy curve and can stop a crucial Thoughtseize or Fatal Push when we're ahead on tempo. Boomerang Basics is cut since bouncing their efficient two-drops like Moon-Circuit Hacker just delays rather than answers the problem, and this matchup is decided by who executes their aggressive plan with less disruption. We keep the rest of our proactive shell intact to continue racing their clock.