Boros Moxite plays a swarm of cheap artifacts and small creatures like Glint Hawk, Kor Skyfisher, and Sneaky Snacker, so Troublemaker Ouphe can exile a key artifact (Melded Moxite, a Bridge land, or Ragged Short Spear) once bargained. Drown in Sorrow's -2/-2 wipes Glint Hawk and Sneaky Snacker, though Kor Skyfisher's 2/3 body survives. Defile is unreliable here since it depends on Swamp count and their board can be wide rather than big, so a flat sweeper is more consistent. Keep Cast Down and Unmake for Kor Skyfisher and anything that slips through the sweeper.