Colorless Prison is a race: they want to land Trinisphere or Karn, the Great Creator before you can fire off Show and Tell, and your fast mana from Ancient Tomb and Lotus Petal means you can often go off on turn one or two before their lock pieces hit. Flusterstorm and Spell Pierce are dead cards against a colorless deck with no instants or sorceries, so they come out entirely. Abrade deals with Trinisphere and Disruptor Flute if they resolve, which are the pieces most likely to hose your combo, while Consign to Memory handles The One Ring and can stop Karn activations. Focus on going fast — if you can Show and Tell an Emrakul or Omniscience on turn one through a fetchland, you almost always win before their lock is functional.