Missing sideboard cards? The full 15-card sideboard runs about $447.
Buy sideboard on ManapoolOcelot Pride Midrange wants to flood the board with token value and gain incidental life, which Dauthi Voidwalker punishes by denying any graveyard recursion while clocking them with an unblockable shadow body. Portable Hole can exile an early Guide of Souls or Ocelot Pride (both mana value 1) before the engine gets going. Orcish Bowmasters on their side punishes our cantrips, so keep the plan lean and resolve Doomsday quickly rather than durdling. Cut Street Wraith and Edge of Autumn since this matchup is about assembling the combo under pressure, not grinding card advantage.
Dimir Tempo relies on Thoughtseize and a deep graveyard/delve shell feeding Nethergoyf and Murktide Regent, so Dauthi Voidwalker cuts off their graveyard resources entirely while pressuring their life total through an unblockable shadow body that dodges Wasteland. Brazen Borrower offers a flash answer to a resolved Murktide Regent or Kaito, Bane of Nightmares. They bring in Barrowgoyf and more discard, so we want efficient proactive threats rather than durdling cards like Street Wraith and Edge of Autumn, which get cut. Play carefully around their Daze and Force of Will when sequencing toward Doomsday.
Sultai Aluren is a glass-cannon combo deck reliant on Show and Tell into Omniscience or Aluren plus cheap creatures, so Force of Negation is premium: it stops their enabler for free on their turn while we hold up our own plan. Orcish Bowmasters punishes their Ponder, Brainstorm, and Stock Up card draw and can snipe a small Aluren creature like a 0/1 token off Malevolent Rumble-style effects before it does work. This is a race of combos, so we trim situational cards like Street Wraith and Edge of Autumn that don't advance our gameplan or interact with theirs. Be mindful they carry Veil of Summer, which can blank our Thoughtseize and Fatal Push, so prioritize resolving Doomsday over grinding.