| Umbral ExpanseSecrets of Strixhaven Commander · 108 | Secrets of Strixhaven Commander | 108 | Rare | €0.81 |
| Umbra MysticRise of the Eldrazi · 52 | Rise of the Eldrazi | 52 | Rare | €3.64 |
| Umbra MysticWilds of Eldraine Commander · 82 | Wilds of Eldraine Commander | 82 | Rare | €3.68 |
| Umbra StalkerEventide · 48 | Eventide | 48 | Rare | €0.43 |
| Umezawa's JitteBetrayers of Kamigawa · 163 | Betrayers of Kamigawa | 163 | Rare | €6.22 |
| Umezawa's JitteGrand Prix Promos · 2010 | Grand Prix Promos | 2010 | Rare | €20.31 |
| Umezawa's JitteThe List Tokens · BOK-163 | The List Tokens | BOK-163 | Rare | €7.00 |
| Umezawa's JitteSecret Lair Drop Tokens · 1288 | Secret Lair Drop Tokens | 1288 | Rare | €10.55 |
| Umezawa's JitteSecret Lair Drop Tokens · 1865 | Secret Lair Drop Tokens | 1865 | Rare | €20.65 |
| Umezawa's JitteArena Anthology 3 · 23 | Arena Anthology 3 | 23 | Rare | — |
| Umezawa's JitteMagic Online Theme Decks · B30 | Magic Online Theme Decks | B30 | Rare | — |
| Umezawa's JitteMagic Online Promos · 36210 | Magic Online Promos | 36210 | Rare | — |
| Umori, the CollectorIkoria: Lair of Behemoths · 231 | Ikoria: Lair of Behemoths | 231 | Rare | €0.22 |
| Umori, the CollectorIkoria: Lair of Behemoths · 358 | Ikoria: Lair of Behemoths | 358 | Rare | $0.44 |
| Umori, the CollectorMultiverse Legends · 62 | Multiverse Legends | 62 | Rare | €0.19 |
| Umori, the CollectorMultiverse Legends · 127 | Multiverse Legends | 127 | Rare | €0.51 |
| Umori, the CollectorMultiverse Legends · 192 | Multiverse Legends | 192 | Rare | €5.90 |
| Umori, the CollectorMultiverse Legends · 192z | Multiverse Legends | 192z | Rare | $199.99 |
| Umori, the CollectorIkoria: Lair of Behemoths Promos · 231p | Ikoria: Lair of Behemoths Promos | 231p | Rare | $0.35 |
| Umori, the CollectorIkoria: Lair of Behemoths Promos · 231s | Ikoria: Lair of Behemoths Promos | 231s | Rare | €0.53 |
| Umori, the CollectorMagic Online Promos · 80813 | Magic Online Promos | 80813 | Rare | — |
| Unbreakable FormationThe Brothers' War Commander · 78 | The Brothers' War Commander | 78 | Rare | €0.58 |
| Unbreakable FormationCommander Legends: Battle for Baldur's Gate · 710 | Commander Legends: Battle for Baldur's Gate | 710 | Rare | €0.25 |
| Unbreakable FormationCommander Legends · 388 | Commander Legends | 388 | Rare | $0.80 |
| Unbreakable FormationDominaria United Commander · 106 | Dominaria United Commander | 106 | Rare | $0.77 |
| Unbreakable FormationTales of Middle-earth Commander · 179 | Tales of Middle-earth Commander | 179 | Rare | $0.91 |
| Unbreakable FormationMidnight Hunt Commander · 95 | Midnight Hunt Commander | 95 | Rare | €0.20 |
| Unbreakable FormationMarch of the Machine Commander · 213 | March of the Machine Commander | 213 | Rare | €0.90 |
| Unbreakable FormationRavnica Allegiance Promos · 29p | Ravnica Allegiance Promos | 29p | Rare | €1.05 |
| Unbreakable FormationRavnica Allegiance Promos · 29s | Ravnica Allegiance Promos | 29s | Rare | €1.89 |
| Unbreakable FormationURL/Convention Promos · 2025-5 | URL/Convention Promos | 2025-5 | Rare | $28.91 |
| Unbreakable FormationRavnica Allegiance · 29 | Ravnica Allegiance | 29 | Rare | €0.61 |
| Unbreakable FormationRavnica Remastered · 32 | Ravnica Remastered | 32 | Rare | €0.78 |
| Unbreakable FormationSecret Lair Drop Tokens · 310 | Secret Lair Drop Tokens | 310 | Rare | €2.70 |
| Unbreakable FormationSecret Lair Drop Tokens · 7052 | Secret Lair Drop Tokens | 7052 | Rare | $1.37 |
| Unbreathing HordeDuel Decks: Blessed vs. Cursed Tokens · 66 | Duel Decks: Blessed vs. Cursed Tokens | 66 | Rare | $0.39 |
| Unbreathing HordeInnistrad · 121 | Innistrad | 121 | Rare | $0.43 |
| Unbreathing HordeStarter Commander Decks · 113 | Starter Commander Decks | 113 | Rare | $0.26 |
| Uncivil UnrestMarch of the Machine Commander · 35 | March of the Machine Commander | 35 | Rare | €16.94 |
| Uncivil UnrestMarch of the Machine Commander · 122 | March of the Machine Commander | 122 | Rare | €13.29 |
| Uncivil UnrestSecret Lair Drop Tokens · 2008 | Secret Lair Drop Tokens | 2008 | Rare | $19.10 |
| Unclaimed TerritoryWizards Play Network 2023 · 11 | Wizards Play Network 2023 | 11 | Rare | €0.68 |
| Uncle's MusingsAvatar: The Last Airbender Eternal · 73 | Avatar: The Last Airbender Eternal | 73 | Rare | $0.46 |
| Uncover the Moon-LettersThe Hobbit · 57 | The Hobbit | 57 | Rare | $0.26 |
| Uncover the Moon-LettersThe Hobbit · 293 | The Hobbit | 293 | Rare | €0.67 |
| Unctus, Grand MetatectPhyrexia: All Will Be One · 75 | Phyrexia: All Will Be One | 75 | Rare | $0.38 |
| Unctus, Grand MetatectPhyrexia: All Will Be One · 303 | Phyrexia: All Will Be One | 303 | Rare | €0.51 |
| Unctus, Grand MetatectPhyrexia: All Will Be One · 433 | Phyrexia: All Will Be One | 433 | Rare | €2.76 |
| Unctus, Grand MetatectPhyrexia: All Will Be One Promos · 75p | Phyrexia: All Will Be One Promos | 75p | Rare | €0.36 |
| Unctus, Grand MetatectPhyrexia: All Will Be One Promos · 75s | Phyrexia: All Will Be One Promos | 75s | Rare | €1.05 |