Grixis Control is loaded with efficient removal (Snuff Out, Cut Down) and counterspells (Counterspell, Spell Pierce), so Duress proactively takes away a key answer or disruption spell before we commit a threat, maximizing the value of our aggressive curve. The extra Thraben Charm provides more removal for Baleful Strix or Murmuring Mystic tokens, and its graveyard-exile mode can disrupt their Plunder the Trollshaws flashback value. Tithing Blade is weak since their creature count is low and split across one-ofs and three-ofs, making the forced sacrifice frequently hit nothing important, while Grim Bauble's small -2/-2 rarely answers anything relevant. Keep the pressure high since this matchup comes down to resolving threats through their removal and countermagic before they stabilize with card advantage.