No sideboard cards are available, so this configuration stays as-is. Izzet Spellementals leans on Eddymurk Crab and Hearth Elemental discounted by cheap cantrips like Opt and Sleight of Hand, so cheap, efficient removal is key — Firebending Lesson can kill Eddymurk Crab (5/5) or Hearth Elemental (4/5) outright if kicked for 5 damage, while Lightning Helix and Sear can weaken a Crab but won't finish it alone. Day of Judgment is strong if they've committed multiple threats, since none of their creatures dodge a sweeper. Keep Negate or No More Lies available for a game-ending Jeskai Revelation-style burst turn, though note this list doesn't actually run that card — their threats are creature-based, so prioritize removal over countermagic.

No sideboard cards are available, so this configuration stays as-is. UR Aggro relies on Slickshot Show-Off backed by cheap cantrips, so early interaction matters: Lightning Helix and Sear both kill Slickshot Show-Off (1/2, though it can pump itself with noncreature spells) before it gets out of hand. Day of Judgment is excellent here since it wipes their board of Colorstorm Stallions at once. Keep No More Lies and Negate up for Burst Lightning going face or a key noncreature threat, and race carefully since they have Burst Lightning as reach.

No sideboard cards are available, so this configuration stays as-is. Azorius Tempo builds a wide board of small evasive fliers like Aven Interrupter and Skycoach Conductor, backed by Aang, Swift Savior, so Day of Judgment is excellent to reset their board once they've overcommitted. Lightning Helix and Sear pick off Voice of Victory before it prevents your spells, or other threats like Skycoach Conductor before they apply pressure. Watch for No More Lies-style disruption from their own counterspell suite being absent — their interaction is light, so this matchup favors landing Jeskai Revelation or resolving Stock Up to simply outgrind them.