Dust to Dust exiles two artifacts at once, hitting their key enablers like Myr Enforcer, Refurbished Familiar, Ichor Wellspring, or Utrom Monitor. The Bridges (Silverbluff Bridge, Mistvault Bridge, Drossforge Bridge) are artifact lands, so they are legal targets too, and since Dust to Dust exiles, their indestructible doesn't protect them. Arms of Hadar's -2/-2 wipes their small creatures outright, such as Krark-Clan Shaman and Refurbished Familiar, slowing their affinity plan. It won't kill Myr Enforcer (a 4/4) or Utrom Monitor (a 3/3), though it shrinks them for the turn. Cutting Rite of Consumption, Marauding Blight-Priest, and Recommission trades our slower synergy pieces for proactive, efficient answers to their low-cost threats. Act quickly since Grixis Affinity wants to flood the board ahead of curve with Galvanic Blast backup for reach.