This is a nonland-heavy mana-ramp/prison deck built around Urza's Tower/Mine/Power Plant and Ancient Tomb, so Damping Sphere caps their bonus mana from those lands and taxes their multi-spell turns. The second Force of Negation lets us pitch a blue card to stop The One Ring, Ugin, Eye of the Storms, or Karn, the Great Creator for free on their turn. We cut Fatal Push and a Thoughtseize since their early game has almost no creatures to kill and discard is weak against a deck that dumps its hand into lands and artifacts quickly. Force of Will and our counter suite remain the core plan to stop their game-ending threats before they resolve.