This Colorless Prison deck has almost no creatures to kill, so Swords to Plowshares is largely dead weight and comes down to make room for better tools. Consign to Memory counters colorless spells and triggered abilities outright, hitting Trinisphere, Karn, the Great Creator, Kozilek's Command, Ugin, Eye of the Storms, and The One Ring as spells, plus triggered abilities like Ugin's cast and static triggers and Way of the Paradox's enters trigger. Note that it cannot stop activated abilities such as Karn's loyalty abilities or The One Ring's draw ability, so counter those cards as spells before they resolve. Crucible of Worlds lets you replay fetchlands from your graveyard, which keeps your land drops flowing in a long grindy game. Prismatic Ending is a weaker trim since it can still exile cheap nonland permanents like Trinisphere, but it can't reach Karn, the Great Creator, and with so few early creature threats to answer, one copy is the safest noncreature removal to cut for more proactive disruption.