39 cards where the text includes “mana value less than or equal”

A-Fires of Invention (Throne of Eldraine #A-125)
Aisha of Sparks and Smoke (Universes Within #12)
Arcade Gannon (Fallout #92)
Arcane Endeavor (Forgotten Realms Commander #14)
Arcane Proxy (The Brothers' War #75)
Argentum Masticore (Phyrexia: All Will Be One #222)
Ayesha Tanaka, Armorer (Dominaria United Commander #29)
Beseech the Queen (Planechase #19)
Bring to Light (Double Masters 2022 #188)
Carmen, Cruel Skymarcher (The Lost Caverns of Ixalan Commander #5)
Cerise, Slayer of Fear (Alchemy: Wilds of Eldraine #1)
Corrosion (Visions #128)
Counterpoint (Murders at Karlov Manor Commander #41)
Covert Technician (Kamigawa: Neon Dynasty #49)
Dominating Vampire (Innistrad: Crimson Vow #154)
Dreadhorde Arcanist (War of the Spark #125)
Drown in the Loch (Commander Legends: Battle for Baldur's Gate #842)
Eriette, the Beguiler (Outlaws of Thunder Junction #202)
Fires of Invention (Throne of Eldraine #125)
Glamdring (The Lord of the Rings: Tales of Middle-earth #239)
Gurgling Anointer (The Brothers' War #104)
Lay Down Arms (The Brothers' War #11)
Light-Paws, Emperor's Voice (Kamigawa: Neon Dynasty #25)
Mausoleum Secrets (Guilds of Ravnica #75)
Minn, Wily Illusionist (Forgotten Realms Commander #16)
Nissa of Shadowed Boughs (Zendikar Rising #231)
Nissa, Steward of Elements (Commander 2020 #224)
Ratchet, Field Medic // Ratchet, Rescue Racer (Transformers #2)
Ratchet, Field Medic // Ratchet, Rescue Racer (Transformers #2)
Ryan Sinclair (Doctor Who #94)
Sarulf, Realm Eater (Kaldheim #228)
Smelting Vat (The Brothers' War Commander #18)
Spectral Arcanist (Crimson Vow Commander #15)
Sphere of Annihilation (Adventures in the Forgotten Realms #121)
Squirming Emergence (The Lost Caverns of Ixalan #241)
Tetsuo, Imperial Champion (Dominaria United Commander #44)
The Moment (Doctor Who #180)
Unleash the Inferno (Streets of New Capenna #229)
Velomachus Lorehold (Strixhaven: School of Mages #245)
Ziatora's Envoy (Streets of New Capenna #232)

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