Missing sideboard cards? The full 15-card sideboard runs about $276.
Buy sideboard on ManapoolOcelot Pride Midrange goes wide with small Cat tokens from Ocelot Pride and Ajani, Nacatl Pariah, and Massacre's -2/-2 sweeps away their 1/1 and 2/1 tokens while leaving our bigger threats like Hogaak and Mockingbird copies untouched. Dauthi Voidwalker provides an unblockable clock that dodges their wide ground stall and punishes any Swords to Plowshares they hold up since it can't be chump-blocked. Stitcher's Supplier is cut because self-mill does nothing productive against their proactive plan and we'd rather have interaction. This matchup rewards us for having a sweeper against their token swarm while racing with evasive threats.
Dimir Tempo relies on resolving and protecting threats like Murktide Regent, Nethergoyf, and Bilbo, so Fatal Push gives us cheap, efficient answers to most of their board while Daze is live against us too. Dauthi Voidwalker is excellent here, pressuring their life total with an unblockable clock while its exile replacement effect disrupts their delve (Murktide Regent) and escape (Nethergoyf) plans. Stitcher's Supplier is a liability since it fuels both decks' graveyards equally and doesn't interact, while Cabal Therapy is weaker against a deck that can rebuild hands quickly with cantrips. Keep the core Brainstorm/Force of Will/Daze suite intact since this is a mirror-ish grindy matchup where card quality and free interaction both matter.
Sultai Aluren wants to resolve Show and Tell into Atraxa, Grand Unifier or set up Aluren into a combo engine, and Consign to Memory counters their colorless spells and triggered abilities, giving us a way to strip value off their artifact mana (Lotus Petal) or disrupt key triggers. Dauthi Voidwalker applies fast unblockable pressure to punish their slower setup turns and its graveyard-exile replacement effect disrupts any Acererak the Archlich or Atraxa recursion plans. Cabal Therapy is weak here because their deck has few cards we can confidently name with Show and Tell/Aluren as the backbone, and Stitcher's Supplier doesn't help us race a combo deck. We keep Force of Will and Daze online since countering Show and Tell or Aluren on the stack is often how we win this matchup.