Dust to Dust exiles two artifacts, hitting their Melded Moxite, Ragged Short Spear, Kor Skyfisher, Glint Hawk, or Sneaky Snacker's artifact-land support, while Arms of Hadar's -2/-2 wipes their small creature swarm (Thraben Inspector, Kor Skyfisher, Sneaky Snacker, and any Robot tokens from Melded Moxite) in one shot. Extract a Confession only removes a single creature, which is much weaker than Arms of Hadar's team-wide sweep against this go-wide plan, and Giant's Boulder is too passive against their aggressive curve. Keep Dispatch and Counterspell as additional interaction, and use Arms of Hadar proactively once they've committed several small bodies to the board.