Missing sideboard cards? The full 15-card sideboard runs about $88.69.
Buy sideboard on ManapoolGolgari grinds with Sheoldred, the Apocalypse and discard, so Unlicensed Hearse helps answer their Graveyard Trespasser and Restless Cottage value engines while giving us a cheap blocker. Surrak, Elusive Hunter can't be countered and punishes their Thoughtseize/Fatal Push-heavy removal suite by drawing cards off targeted interaction. Trim the clunkier Ulvenwald Oddity copies and the single Polukranos Reborn since they're removal magnets against a deck full of Fatal Push, Abrupt Decay, and Bitter Triumph. Keep the full ramp and Storm the Festival package intact since out-grinding them with bigger threats is still the plan.
Temur Creativity leans on countermagic like Spell Pierce, Spell Snare, and Make Disappear, so Surrak, Elusive Hunter's uncounterable clause lets us land a threat that also draws cards off their removal. Scrapshooter's gift mode can destroy an artifact or enchantment, which can pick off a Fable of the Mirror-Breaker or a Clue from Deduce, though the gift gives them a card, so its main value here is just another efficient 4/4 body. Ulvenwald Oddity and the lone Polukranos Reborn come out since they're clunky against a deck that wants to counter our spells rather than race combat. Keep the mana dorks and Storm the Festival as the primary gameplan to simply out-ramp their Indomitable Creativity shenanigans.
Selesnya Company wants to curve out small creatures and go wide, so Arasta of the Endless Web's Reach body helps block their fliers and ground creatures alike, while Scrapshooter's Reach also trades well and, if you promise the gift, can destroy an artifact or enchantment like Unlicensed Hearse if needed. Ulvenwald Oddity is a slower, go-wide payoff that is less impactful against a deck that answers individual threats with Skyclave Apparition and Get Lost rather than sweepers, so it can be trimmed. We're keeping the full Cavalier of Thorns and Storm the Festival package since our ramp plan is still the primary way to outsize their board. Watch out for Archon of Emeria limiting each player to one spell per turn and making our nonbasic lands, like Nykthos, enter tapped, and for Skyclave Apparition exiling our key ramp creatures or Kiora.