Esper GenericBlink is a grindy midrange deck full of blue spells (Ephemerate, Orcish Bowmasters triggers care about draws, Teferi, Kaito) so Mystical Dispute is frequently a two-mana hard counter against their Solitude evokes or removal-adjacent interaction, and it also answers their own Mystical Dispute if boarded in. Endurance's evoke lets us proactively deny value from their graveyard (Overlord of the Balemurk mills, Emperor of Bones recursion) while also giving us a free flash blocker against Phelia or Flickerwisp aggression. We trim the small-creature removal (Dead // Gone, Sink into Stupor, Dismember) since their key threats are Solitude, Overlord of the Balemurk, and Quantum Riddler, which dodge or outsize that removal anyway. Keep Force of Negation and Subtlety at full count to fight through their Thoughtseize-backed disruption plan.