55 cards where the mana cost is greater than or equal to {U/R} or the text includes “{u/r}”

Cascade Bluffs (Outlaws of Thunder Junction Commander #276)
Saheeli, Sublime Artificer (Commander Masters #935)
Expansion // Explosion (Ravnica Remastered #243)
Magma Opus (Strixhaven: School of Mages #203)
Izzet Locket (Commander 2019 #215)
Mizzix, Replica Rider (Jumpstart 2022 #35)
Teach by Example (Strixhaven: School of Mages #241)
Clout of the Dominus (Eventide #99)
Lore Drakkis (Ikoria: Lair of Behemoths #194)
Soulfire Grand Master (Fate Reforged #27)
Rush of Inspiration // Crackling Falls (Modern Horizons 3 #257)
Rush of Inspiration // Crackling Falls (Modern Horizons 3 #257)
Dominus of Fealty (Commander 2011 #194)
Slave of Bolas (Archenemy: Nicol Bolas #86)
Invert // Invent (Guilds of Ravnica #228)
Tempest Angler (Bloomburrow #235)
Creative Outburst (Strixhaven: School of Mages #171)
Elemental Masterpiece (Strixhaven: School of Mages #182)
Djinn Illuminatus (Commander 2020 #210)
Yasova Dragonclaw (Fate Reforged #148)
Call the Skybreaker (New Capenna Commander #333)
Mindwrack Liege (Double Masters 2022 #255)
Izzet Guildmage (Ravnica Remastered #191)
Noggle Ransacker (Planechase Anthology #102)
Maelstrom Muse (Strixhaven: School of Mages #202)
Loch Dragon (Throne of Eldraine #211)
Blistercoil Weird (Return to Ravnica #211)
Inside Out (Eventide #103)
Elemental Expressionist (Strixhaven: School of Mages #181)
Crackleburr (Eventide #100)
Elemental Summoning (Strixhaven: School of Mages #183)
Grixis Grimblade (Alara Reborn #134)
Nivmagus Elemental (Return to Ravnica #219)
Nucklavee (Duel Decks: Mind vs. Might #26)
Prismari Pledgemage (Strixhaven: School of Mages #215)
Mirror Sheen (Eventide #105)
Ecstatic Electromancer (Ravnica: Clue Edition #31)
Gadget Technician (Murders at Karlov Manor #204)
Resonance Technician (Ravnica: Clue Edition #41)
Piston-Fist Cyclops (Guilds of Ravnica #217)
Hustle // Bustle (Murders at Karlov Manor #249)
Shrewd Hatchling (Modern Masters 2015 #198)
Noggle Hedge-Mage (Eventide #108)
Noggle Bandit (Eventide #106)
Maestros Initiate (Streets of New Capenna #86)
Petrahydrox (Ravnica Remastered #209)
Frostburn Weird (Ravnica: Clue Edition #193)
Stream Hopper (Eventide #113)
Sewn-Eye Drake (Alara Reborn #135)
Riverfall Mimic (Eventide #111)
Crag Puca (Eventide #101)
Unnerving Assault (Eventide #114)
Noggle Bridgebreaker (Eventide #107)
Talonrend (Eventide #30)
A-Maelstrom Muse (Strixhaven: School of Mages #A-202)
Lutri, the Spellchaser (Ikoria: Lair of Behemoths #227)

This search is finished. Now the real work can begin.