Missing sideboard cards? The full 15-card sideboard runs about $42.57.
Buy sideboard on ManapoolOcelot Pride Midrange goes wide with Cat tokens and applies pressure through Guide of Souls and Ajani, so Fury's ETB trigger (4 damage divided among creatures/planeswalkers) is excellent for cleaning up multiple 1-toughness Cats or clipping an early Ajani, Nacatl Pariah. Trumpeting Carnosaur's discover 5 and its 7/6 trample body stabilize against their aggressive clock, and its activated mode can burn down a Voice of Victory or Amped Raptor. Maelstrom Wanderer is too slow and clunky against their Wasteland/Thoughtseize disruption package, and Tibalt's Trickery is unreliable when we need to stabilize against a fast board rather than gamble on a random spell. Keep Apex Devastator and Call Forth the Tempest in as they can wipe their token board and refill our own threats simultaneously.
Dimir Tempo relies on Force of Will and Daze to protect cheap threats like Moonshadow and Nethergoyf, so Tibalt's Trickery is a liability here: it fills their graveyard, which powers Nethergoyf and Moonshadow, and hands them a free spell. Cut both Trickery copies alongside both Maelstrom Wanderers, which are clunky eight-mana spells against free countermagic. Trumpeting Carnosaur comes in as a hard-hitting threat that discovers 5 when it enters, and its discard ability can snipe Orcish Bowmasters or Kaito. Ingot Chewer is marginal here, though its enter trigger can destroy Mishra's Bauble; mainly it's a reasonable rate body. Keep the cascade suite intact since it generates card advantage faster than Thoughtseize/Force of Will can keep up.
Sultai Aluren wants to resolve Show and Tell into Omniscience or Atraxa, Grand Unifier, or combo off with Aluren and Acererak the Archlich; Leyline of the Void can be put onto the battlefield for free from your opening hand and exiles any card that would go to their graveyard, while costing you nothing on turn one. Call Forth the Tempest is a clunky eight-mana sorcery that does little against a deck whose real threats are Show and Tell and Atraxa rather than a wide creature board, so it comes out. Keep your cascade spells like Violent Outburst and Throes of Chaos in to find free value and apply pressure before their engine turns on. Prioritize Ancient Tomb-fueled starts to beat them to the punch, since their four Force of Will can stop your key spell if you give them time to set up.