Dimir Tempo leans on Thoughtseize, Fatal Push, Daze, and Force of Will, so Veil of Summer blanks a Thoughtseize outright, prevents our spells from being countered, and gives us and our permanents hexproof from blue and black on the turn we try to resolve a payoff. Carpet of Flowers takes advantage of their Underground Seas and other Islands to add mana in a main phase, letting us easily play through Daze. Acererak only dies to Fatal Push if revolt is triggered and is too slow, so trim a couple copies for protection. Ancient Tomb is a fine minor cut since Wasteland punishes greedy lands and we have alternate acceleration.

Ocelot Pride Midrange is loaded with cheap interaction, so a second set of Veil of Summer protects our spells from being countered by blue-hating instants. Consign to Memory counters Ocelot Pride and Guide of Souls triggered abilities along with any colorless spells, both of which are key engine pieces that generate their card and board advantage. Omniscience is too slow and clunky against an aggressive, disruptive creature deck that pressures our life total and hands quickly, and City of Traitors' self-sacrifice clause is a liability against Wasteland-heavy decks, so we trim both.

Chalice of the Void on 0 or 1 is brutal against Lotus Petal, Ponder, and Brainstorm, so cut the clunky 10-mana Omniscience plan and lean on the Aluren/Show and Tell package instead. Consign to Memory strips Chalice before it locks you out, counters Thought-Knot Seer or Reality Smasher's protection trigger, and can even stop a colorless Kozilek's Command. Faerie Macabre answers their own Kozilek's Command graveyard fills and can be pitched for free later if drawn dead. Veil of Summer is largely a blank here since Eldrazi rarely casts blue or black spells, so it comes out for more targeted interaction.