| Typhoid RatsArena Beginner Set · 63 | Arena Beginner Set | 63 | Common | — |
| Tyrant's ChoiceConspiracy · 30 | Conspiracy | 30 | Common | €0.55 |
| Tyrant's ChoiceVintage Masters · 143 | Vintage Masters | 143 | Common | — |
| Tyrant's MachineBattlebond · 248 | Battlebond | 248 | Common | €0.05 |
| Tyrant's MachineMagic 2015 · 238 | Magic 2015 | 238 | Common | €0.02 |
| TyrranaxFifth Dawn · 98 | Fifth Dawn | 98 | Common | €0.06 |
| Tyrranax AtrocityPhyrexia: All Will Be One · 188 | Phyrexia: All Will Be One | 188 | Common | €0.07 |
| Ubul Sar GatekeepersDragon's Maze · 30 | Dragon's Maze | 30 | Common | €0.06 |
| Uktabi DrakePlanar Chaos · 141 | Planar Chaos | 141 | Common | €0.04 |
| Uktabi DrakeTime Spiral Remastered · 243 | Time Spiral Remastered | 243 | Common | €0.07 |
| Uktabi EfreetWeatherlight · 143 | Weatherlight | 143 | Common | $0.03 |
| Uktabi FaerieMirage · 247 | Mirage | 247 | Common | €0.14 |
| Ulamog's CrusherCommander Masters · 6 | Commander Masters | 6 | Common | $0.24 |
| Ulamog's CrusherDuel Decks: Zendikar vs. Eldrazi Tokens · 44 | Duel Decks: Zendikar vs. Eldrazi Tokens | 44 | Common | €0.21 |
| Ulamog's CrusherModern Horizons 3 Commander · 161 | Modern Horizons 3 Commander | 161 | Common | €0.32 |
| Ulamog's CrusherModern Masters 2015 · 7 | Modern Masters 2015 | 7 | Common | €0.27 |
| Ulamog's CrusherRise of the Eldrazi · 13 | Rise of the Eldrazi | 13 | Common | €0.31 |
| Ulamog's CrusherUltimate Masters · 8 | Ultimate Masters | 8 | Common | €0.32 |
| Ulamog's CrusherThe List Tokens · UMA-8 | The List Tokens | UMA-8 | Common | — |
| Ulna Alley ShopkeepSecrets of Strixhaven · 103 | Secrets of Strixhaven | 103 | Common | €0.05 |
| Ultimate AllianceMarvel Super Heroes Commander · 611 | Marvel Super Heroes Commander | 611 | Common | €0.17 |
| Ultron DroneMarvel Super Heroes · 253 | Marvel Super Heroes | 253 | Common | €0.09 |
| Ulvenwald BearDark Ascension · 129 | Dark Ascension | 129 | Common | €0.16 |
| Ulvenwald Captive // Ulvenwald AbominationEldritch Moon · 175 | Eldritch Moon | 175 | Common | €0.09 |
| Ulvenwald Captive // Ulvenwald AbominationShadows over Innistrad Remastered · 221 | Shadows over Innistrad Remastered | 221 | Common | — |
| Umara EntanglerOath of the Gatewatch · 65 | Oath of the Gatewatch | 65 | Common | €0.06 |
| Umara RaptorZendikar · 75 | Zendikar | 75 | Common | €0.07 |
| Umezawa's CharmModern Horizons · 111 | Modern Horizons | 111 | Common | €0.05 |
| Unable to ScreamDuskmourn: House of Horror · 78 | Duskmourn: House of Horror | 78 | Common | €0.21 |
| Unagi's SprayAvatar: The Last Airbender Eternal · 97 | Avatar: The Last Airbender Eternal | 97 | Common | €0.13 |
| Unassuming Gelatinous SerpentUnfinity Sticker Sheets · 36 | Unfinity Sticker Sheets | 36 | Common | $0.35 |
| Unassuming SageWilds of Eldraine · 37 | Wilds of Eldraine | 37 | Common | €0.03 |
| Unauthorized ExitMurders at Karlov Manor · 74 | Murders at Karlov Manor | 74 | Common | €0.15 |
| Unauthorized ExitMurders at Karlov Manor · 298 | Murders at Karlov Manor | 298 | Common | €0.07 |
| Unblinking BlebFuture Sight · 45 | Future Sight | 45 | Common | €0.18 |
| Unblinking ObserverInnistrad: Double Feature · 82 | Innistrad: Double Feature | 82 | Common | €0.12 |
| Unblinking ObserverInnistrad: Midnight Hunt · 82 | Innistrad: Midnight Hunt | 82 | Common | €0.06 |
| Unbounded PotentialCommander Masters · 67 | Commander Masters | 67 | Common | €0.13 |
| Unbounded PotentialModern Horizons 2 · 36 | Modern Horizons 2 | 36 | Common | €0.07 |
| Unbounded PotentialThe List Tokens · MH2-36 | The List Tokens | MH2-36 | Common | $0.16 |
| Unbridled GrowthAether Revolt · 126 | Aether Revolt | 126 | Common | €0.14 |
| Unbridled GrowthKaladesh Remastered · 184 | Kaladesh Remastered | 184 | Common | — |
| UnburdenAmonkhet · 114 | Amonkhet | 114 | Common | $0.05 |
| UnburdenScourge · 77 | Scourge | 77 | Common | €0.06 |
| UnburdenThe List Tokens · AKH-114 | The List Tokens | AKH-114 | Common | €0.09 |
| UnburdenAmonkhet Remastered · 131 | Amonkhet Remastered | 131 | Common | — |
| Unburied EarthcarverTarkir: Dragonstorm · 95 | Tarkir: Dragonstorm | 95 | Common | €0.04 |
| Uncaged FuryMasters 25 · 155 | Masters 25 | 155 | Common | €0.12 |
| Uncaged FuryShadows over Innistrad · 188 | Shadows over Innistrad | 188 | Common | €0.02 |
| Uncaged FuryThe List Tokens · A25-155 | The List Tokens | A25-155 | Common | €0.10 |