A-Buy Your Silence

Not yet bracketed (or genuinely unplaceable).

—

5cmc instant that exiles any nonland permanent and gives the opponent a Treasure token as a consolation. Broad permanent exile (hits creatures, artifacts, enchantments, planeswalkers) makes it a reliable catch-all in white control/midrange shells in Brawl. The Treasure softens the tempo cost for the opponent, and the steep 5-mana price tag keeps it out of aggro and tempo strategies.