60 cards where (the text includes “opponent” and the text includes “tapped”) and the color identity ≤ RU and it’s legal in Commander

Benthic Explorers (Masters Edition III #29)
Betrayal (Visions #26)
Beyeen Veil // Beyeen Coast (Zendikar Rising #46)
Beyeen Veil // Beyeen Coast (Zendikar Rising #46)
Borrowing 100,000 Arrows (Masters 25 #45)
Callous Oppressor (Onslaught #72)
Cone of Cold (Commander Legends: Battle for Baldur's Gate #61)
Crackling Perimeter (Gatecrash #88)
Cryptolith Fragment // Aurora of Emrakul (Eldritch Moon #193)
Cryptolith Fragment // Aurora of Emrakul (Eldritch Moon #193)
Daring Thief (Journey into Nyx #36)
Deepwater Hypnotist (Born of the Gods #35)
Dichotomancy (Planar Chaos #38)
Eroded Canyon (Outlaws of Thunder Junction #256)
Farsight Mask (Planechase Anthology #109)
Frozen Aether (Planar Chaos #54)
Generous Plunderer (The Big Score #11)
Ghostly Pilferer (Outlaws of Thunder Junction Commander #98)
Glistening Sphere (Phyrexia: All Will Be One Commander #20)
Great Train Heist (Outlaws of Thunder Junction #125)
Grimoire Thief (Morningtide #35)
Harbinger of the Tides (Duel Decks: Merfolk vs. Goblins #7)
Hylda's Crown of Winter (Wilds of Eldraine #247)
Icewrought Sentry (Wilds of Eldraine #55)
Impetuous Protege (Battlebond #19)
Isolated Watchtower (Commander 2018 #59)
Jester's Mask (Masters Edition II #211)
Lifetap (Fifth Edition #99)
Mana Geyser (Commander 2021 #176)
Mana Web (Weatherlight #152)
Mystifying Maze (Commander 2017 #264)
Nemesis Phoenix (Commander Legends: Battle for Baldur's Gate #189)
Nezahal, Primal Tide (Commander Legends #401)
Ojer Axonil, Deepest Might // Temple of Power (The Lost Caverns of Ixalan #158)
Ojer Axonil, Deepest Might // Temple of Power (The Lost Caverns of Ixalan #158)
Pallimud (Tempest #195)
Phyrexian Atlas (Phyrexia: All Will Be One #237)
Realmbreaker, the Invasion Tree (March of the Machine #263)
Relic Bind (Fourth Edition #97)
Reservoir Kraken (Streets of New Capenna #56)
Scroll of Isildur (The Lord of the Rings: Tales of Middle-earth #69)
Shackle Slinger (Outlaws of Thunder Junction #65)
Skyline Cascade (Battle for Zendikar #246)
Soldevi Golem (Masters Edition IV #228)
Soldevi Steam Beast (Alliances #133a)
Sorrow's Path (Masters Edition III #211)
Spinerock Knoll (Commander Legends: Battle for Baldur's Gate #916)
Spireside Infiltrator (Kaladesh #133)
Stitched Mangler (Shadows over Innistrad #89)
Sunshot Militia (The Lost Caverns of Ixalan #168)
Thalakos Dreamsower (Tempest #92)
The Akroan War (Commander Legends: Battle for Baldur's Gate #777)
Theft of Dreams (Masters Edition IV #67)
The Watcher in the Water (The Lord of the Rings: Tales of Middle-earth #75)
Thran Spider (The Brothers' War #254)
Throne of the God-Pharaoh (Amonkhet #237)
Tiller Engine (Dominaria United Commander #20)
Time of Ice (Dominaria #70)
Training Center (Commander Masters #434)
Uphill Battle (Mercadian Masques #222)
Urabrask the Hidden (Commander Legends: Battle for Baldur's Gate #811)
Verity Circle (Crimson Vow Commander #116)
Zada's Commando (Oath of the Gatewatch #120)

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