Sultai Control runs a deep pile of singleton legendary threats backed by Celestial Reunion tutoring and Cloak and Dagger, Entwined disruption. Duress strips a key piece like Celestial Reunion before it can tutor up a threat. Get Lost is clean, unconditional removal for whichever big legendary threat they've resolved, since many of their creatures dodge your other removal by mana value alone. Dawn's Truce protects your board at the moment they try to stabilize with a removal spell. Iron-Shield Elf and Practiced Offense are too slow against this much interaction and card quality, so both come out along with a Sunset Saboteur.