This is the mirror against Dimir Midrange, so incremental card advantage and disruption matter most; Consign to Memory answers their Orcish Bowmasters triggers and colorless permanents like Clue tokens, while Mystical Dispute is cheap and efficient against their Counterspell, Force of Negation, and Subtlety since it targets blue spells. Harbinger of the Seas turning their nonbasics into Islands can strand their black mana for Thoughtseize, Fatal Push, and Orcish Bowmasters. Trim Spell Snare and Sink into Stupor slightly since both decks run similar interaction and card selection, so extra copies of narrow answers are less impactful than proactive threats; cut some Preordain for a leaner, higher-impact configuration. Keep Thoughtseize, Fatal Push, and Psychic Frog as the core of your plan to win the attrition battle.