Dimir Midrange is a blue-black deck packed with Thoughtseize, Counterspell, Force of Negation, Spell Snare, and Orcish Bowmasters — Veil of Summer is exceptional here, making our spells uncounterable, giving us hexproof from their removal, and drawing a card if they've cast a blue or black spell this turn, which will be almost every turn. Surgical Extraction lets us strip their Thoughtseize or key threats like Psychic Frog once a copy hits the graveyard. We trim reactive/passive cards like Revitalizing Repast and Plunge into Darkness that don't interact with their disruption suite, prioritizing protection and proactive discard/removal instead.