Sultai Aluren is a glass-cannon combo deck itself, reliant on Show and Tell, Aluren, or Omniscience plus Force of Will backup; Thoughtseize proactively strips away their enabler or their Force of Will before they can protect their combo. This is a race, so Destroy the Evidence (too slow, land-focused) and Bridge from Below (a payoff for creature deaths, less relevant when we want to go under them quickly) can be trimmed. Dread Return is replaceable since it costs 4 and competes with our proactive plan of just winning first. Keep Pact of Negation and the rest of the fast mana intact to protect our own combo turn against their Force of Will.