Missing sideboard cards? The full 15-card sideboard runs about $48.35.
Buy sideboard on ManapoolConsign to Memory counters their Orcish Bowmasters triggered ability or any colorless spell they might sneak in, and its replicate mode can even stop multiple triggers at once. Surgical Extraction lets us strip a key card like Murktide Regent or Tamiyo, Inquisitive Student once it hits the graveyard, exiling any remaining copies from their graveyard, hand, and library. Wrath of the Skies is far too slow and symmetrical against a tempo deck that wants to keep few permanents in play, so it comes out. Spell Pierce is weaker here since they run cheap, resilient threats and plenty of mana to pay the tax, and Solitude is less impactful against a deck light on big threats.
Ocelot Pride wants to flood the board with token value, so Wrath of the Skies is a great sweeper that can be scaled to blow out their whole board while dodging their own Wrath of the Skies plan. Containment Priest does not shut off Ajani's flip trigger returning transformed as a planeswalker and does not stop any token-copy shenanigans that rely on entering the battlefield, since it only affects nontoken creatures. Deafening Silence limits noncreature spells each turn, though Ocelot Pride triggers from gaining life rather than noncreature spells and Ajani activations are unaffected. Force of Negation comes out since the matchup is more about surviving the board state than countering individual spells, and Spell Pierce is weak against a deck full of cheap creatures.
This is a mirror-like matchup, so the biggest edge comes from small disruptive upgrades rather than a full overhaul. Lavinia, Azorius Renegade is excellent here since it shuts off their Force of Will and Force of Negation free-cast lines while also taxing their Teferi, Time Raveler and Leyline Binding-style plays. Wrath of the Skies is symmetrical and slow against a deck built the same way we are, with similarly low creature counts, so it's a clean cut. Everything else in our shell lines up well against their mirror-image game plan, so we keep the rest of the list intact.