52 cards where the text includes “mill” and the color identity ≤ RW and (the card is available on Paper) and it’s legal in Commander

Altar of Dementia (Modern Horizons #218)
Tibalt's Trickery (Kaldheim #153)
Mindcrank (Commander Legends: Battle for Baldur's Gate #866)
Mesmeric Orb (Double Masters #272)
Altar of the Brood (Khans of Tarkir #216)
Combustible Gearhulk (Commander 2021 #163)
Perpetual Timepiece (Outlaws of Thunder Junction Commander #263)
Millikin (Dominaria Remastered #231)
Codex Shredder (Commander Legends #304)
Palantír of Orthanc (The Lord of the Rings: Tales of Middle-earth #247)
Grinding Station (Fifth Dawn #127)
Sword of Body and Mind (Double Masters #295)
Realmbreaker, the Invasion Tree (March of the Machine #263)
Armillary Sphere (Commander Legends #298)
Wondrous Crucible (The Brothers' War Commander #20)
The Millennium Calendar (The Lost Caverns of Ixalan #257)
Ghoulcaller's Bell (Innistrad #224)
Sequestered Stash (Kaladesh #248)
Keening Stone (Commander 2016 #259)
Grindstone (Tempest #290)
Convergence of Dominion (Warhammer 40,000 Commander #154)
Necron Monolith (Warhammer 40,000 Commander #161)
Relic Golem (Zendikar Rising #249)
Helm of Obedience (Alliances #121)
Embalmer's Tools (Amonkhet #227)
Wand of Vertebrae (Guilds of Ravnica #242)
Millstone (Core Set 2019 #242)
Reito Sentinel (Kamigawa: Neon Dynasty #256)
Sands of Delirium (Magic 2013 #216)
Grindclock (Magic 2015 #217)
Decimator Web (Mirrodin Besieged #105)
Excavated Wall (Strixhaven: School of Mages #255)
Lorehold Excavation (Strixhaven: School of Mages #200)
Airlift Chaplain (The Brothers' War #2)
Shriekhorn (Mirrodin Besieged #130)
Hair-Strung Koto (Champions of Kamigawa #252)
Shard of Broken Glass (Shadows over Innistrad #262)
Charmed Pendant (Odyssey #298)
Book Burning (Judgment #80)
Worry Beads (Mercadian Masques #315)
Whetstone (Urza's Saga #316)
Screaming Shield (Ravnica Allegiance #239)
Tomakul Scrapsmith (The Brothers' War #153)
Whetwheel (Future Sight #168)
Heretic's Punishment (Innistrad #147)
Leyline Dowser (Outlaws of Thunder Junction Commander #39)
Tower of Murmurs (Mirrodin #268)
Flint Golem (Nemesis #130)
Song of Blood (Visions #94)
Loafing Giant (Invasion #153)
Trash Bin (Unfinity #232a)
Unassuming Gelatinous Serpent (Unfinity Sticker Sheets #36)

Though this query has ended, its relics still slumber in New Argive.