Neobrand wants to combo off quickly with Neoform, Eldritch Evolution, and Summoner's Pact to assemble a huge board and swing for lethal, so the extra Consign to Memory helps counter a colorless spell or key triggered ability, and it also stops their own Consign to Memory-based interaction indirectly by forcing tempo. Mystical Dispute is a cheap generic counter here, useful against Endurance being evoked, Veil of Summer, or their own Mystical Dispute copies, and discounted against any blue spells they run like Neoform. Lightning Bolt and Prismatic Ending are too slow and reactive against a combo deck that's trying to win outright rather than grind on board, so we prioritize proactive counters over removal.