“Jeskai Control leverages a layered card advantage engine — cycling through Stock Up, Consult the Star Charts, and Tablet of Discovery in the early turns to hit land drops and find answers, while Jeskai Revelation serves as the primary mid-to-late game value engine that compounds card quality over time. The deck uses a suite of flexible, mostly-singleton removal spells (Pyroclasm, Day of Judgment, Fire Magic, Sear, Erode) and light countermagic (Negate, Three Steps Ahead, Flashback) to neutralize threats on a reactive basis, keeping opponents off-balance without committing to dedicated removal packages that can be stranded. Great Hall of the Biblioplex functions as a mana-sink win condition in long games, ensuring the control player never runs out of resources even when they've exhausted their spell-based draw.”
Missing sideboard cards? The full 15-card sideboard runs about $47.35.
Buy sideboard on ManapoolIzzet Spellementals is built around red and blue spells, and Flashfreeze counters any red spell, so it answers Prismari Charm, Traumatic Critique, Burst Lightning, Impractical Joke, Hearth Elemental, and Colorstorm Stallion out of the sideboard. It cannot hit Eddymurk Crab or Sunderflock, which are mono-blue, so save it for the red cards. Get Lost is clean instant-speed removal for the big bodies that Flashfreeze can't touch, such as Eddymurk Crab, Sunderflock, and Hearth Elemental. Trim Consult the Star Charts since it does nothing to interact with their threats, and cut the Lightning Helix copies since 3 damage doesn't kill Hearth Elemental, Eddymurk Crab, or Sunderflock. Day of Judgment and your new instants are better suited to a board full of large Elementals. Keep Day of Judgment in as the primary sweeper against their Elemental creatures.
UR Aggro's plan revolves around small creatures like Elusive Otter, Pompous Battlemage, and Slickshot Show-Off, so Fire Magic at the Fira tier (2 damage to each creature) can sweep their small early creatures like Elusive Otter and Slickshot Show-Off for {2} on top of its {R} cost. Flashfreeze is an instant that counters only red or green spells, so it can stop their Burst Lightning, Slickshot Show-Off, or Impractical Joke, but it cannot hit the mono-blue Bounce Off. No More Lies is downgraded against a deck that plays cheap, efficient spells where paying {3} is often trivial for them, and Consult the Star Charts is too slow against this clock. Keep Day of Judgment in reserve as a bigger sweeper if their board gets out of hand, such as a creature enlarged by Secret Identity that Fire Magic can't kill.
Dimir Midrange's Kaito, Bane of Nightmares and Enduring Curiosity are powerful recurring threats, and Strategic Betrayal exiles the creature outright along with their graveyard, denying any grindy recursion plan. Ancient Vendetta can proactively strip a problematic card like Kaito or Requiting Hex from their deck entirely if you're ahead on information. The Mind Stone is replaceable since you don't need the ramp against a midrange deck with efficient removal of its own, and Flashback is weaker here since their removal suite (Bitter Triumph, Shoot the Sheriff) isn't an instant/sorcery density you want to loop. Keep Jeskai Revelation and Day of Judgment in as your best tools against their creature-based value engines.