Annul counters Survival of the Fittest itself, denying their entire toolbox engine before it can start finding answers and threats. Chill only affects red spells, so it stays in the sideboard. Thwart's Island-bounce cost is too disruptive to our own mana against a creature deck that punishes tempo loss. Root Maze slows down Gaea's Cradle from entering ready to tap, supporting the Stasis lock plan.