26 cards where the text includes “whenever” and the text includes “cast” and the text includes “instant” and the text includes “create” and the color identity ≤ RU

A-Rowan, Scholar of Sparks // A-Will, Scholar of Frost (Strixhaven: School of Mages #A-156)
A-Rowan, Scholar of Sparks // A-Will, Scholar of Frost (Strixhaven: School of Mages #A-156)
Baral and Kari Zev (March of the Machine #218)
Deekah, Fractal Theorist (Commander 2021 #26)
Docent of Perfection // Final Iteration (Eldritch Moon #56)
Docent of Perfection // Final Iteration (Eldritch Moon #56)
Elemental Expressionist (Strixhaven: School of Mages #181)
Eris, Roar of the Storm (Outlaws of Thunder Junction Commander #5)
Geometric Nexus (Commander 2021 #77)
Jaya, Fiery Negotiator (Dominaria United #133)
Magnus the Red (Warhammer 40,000 Commander #131)
Metallurgic Summonings (Commander 2021 #122)
Murmuring Mystic (Outlaws of Thunder Junction Commander #102)
Orvar, the All-Form (Kaldheim #70)
Pink Horror (Warhammer 40,000 Commander #136)
Poppet Stitcher // Poppet Factory (Innistrad: Midnight Hunt #71)
Poppet Stitcher // Poppet Factory (Innistrad: Midnight Hunt #71)
Precursor Golem (Modern Masters 2015 #225)
Ral, Crackling Wit (Bloomburrow #230)
Rowan, Scholar of Sparks // Will, Scholar of Frost (Strixhaven: School of Mages #156)
Rowan, Scholar of Sparks // Will, Scholar of Frost (Strixhaven: School of Mages #156)
Splashy Spellcaster (Wilds of Eldraine #70)
Stormchaser's Talent (Bloomburrow #75)
Storm-Kiln Artist (Outlaws of Thunder Junction Commander #181)
Stormsplitter (Bloomburrow #154)
Sword of Wealth and Power (The Big Score #26)
Talrand, Sky Summoner (Outlaws of Thunder Junction Commander #116)
Urabrask // The Great Work (March of the Machine #169)
Urabrask // The Great Work (March of the Machine #169)
Young Pyromancer (Outlaws of Thunder Junction Commander #185)
Zaffai, Thunder Conductor (Commander 2021 #4)

The message was clear to Sorin—time to search for something else.