Annul is a premium answer to Stasis, locking us out before it ever resolves, and also hits Powder Keg, both of which can be backbreaking if they land. Circular Logic is weak in a mirror-ish blue matchup where both players' graveyards start empty and Thwart/Arcane Denial punish tapping out. Keep Foil and Counterspell as our primary answers to their own countermagic and Stasis backup copies, and Duress to strip Stasis or Upheaval proactively before they can protect it.