Missing sideboard cards? The full 15-card sideboard runs about $147.
Buy sideboard on ManapoolOcelot Pride Midrange wins by going wide with Cat tokens, so Wrath of the Skies is our best sweeper to reset their board, and Triumph of Saint Katherine's lifelink 5/5 body blocks and races well. Containment Priest is a cheap flash blocker that can ambush their 1/1 Cats and lets us develop a body at instant speed without tapping out on our own turn. Consign to Memory is weak since this deck is creature- and planeswalker-heavy rather than colorless-spell-heavy, and Stifle has limited great targets here, so we trim both along with one Quantum Riddler since we want a lower, more efficient curve against their aggression.
Dimir Tempo relies on resolving Moonshadow, Bilbo, or Kaito and backing them up with Force of Will and Daze, so Force of Negation lets us fight on the stack proactively, countering noncreature spells like Kaito, Thoughtseize, and their own protective counterspells. Stifle has fewer high-value ability targets against their plan, and Snapcaster Mage is a lower priority since we want more pure interaction against their threats, so one copy of each gets trimmed. Keep Wasteland, Daze, and our full Force of Will count, as the mana and tempo war is central to this matchup.
Sultai Aluren wants to resolve Show and Tell into Omniscience or Atraxa, or combo off by casting Acererak for free with Aluren, so Force of Negation lets us stop their key noncreature spells (Show and Tell, Aluren, Omniscience) for free on their turn. Containment Priest comes in because Show and Tell can only put Atraxa, Acererak or Emrakul onto the battlefield without casting them, and the Priest exiles any nontoken creature that enters that way instead. Lavinia, Azorius Renegade counters any spell they cast without spending mana, such as creatures cast for free with Aluren. She also stops them from casting noncreature spells with mana value greater than the number of lands they control, which slows Show and Tell, Aluren and Omniscience. Surgical Extraction can strip a copy of Show and Tell or Aluren from their deck once one is in their graveyard, to blunt a redraw. Stifle has fewer relevant ability targets here, and Daze is weaker on the draw against a deck that can simply pay through it with their explosive mana (Ancient Tomb, Lotus Petal), and one Quantum Riddler comes out to make room since we need to prioritize interaction over card advantage against their faster combo clock.