This Colorless Prison deck is loaded with colorless spells (Karn, The One Ring, Ugin) that Consign to Memory can counter outright, and Pithing Needle can shut down Karn's -2 or The One Ring's draw ability. Force of Negation can counter Karn, the Great Creator or Ugin, Eye of the Storms before they take over the game. We trim Shuko since it doesn't help race a deck that isn't attacking, cut Cabal Therapy since countermagic is more effective than hand disruption here, and cut one Swords to Plowshares copy since they run almost no creature targets.