| Underworld DreamsTenth Edition · 184 | Tenth Edition | 184 | Rare | €2.53 |
| Underworld DreamsEighth Edition · 168 | Eighth Edition | 168 | Rare | €1.51 |
| Underworld DreamsEighth Edition · 168★ | Eighth Edition | 168★ | Rare | $4.94 |
| Underworld DreamsNinth Edition · 167 | Ninth Edition | 167 | Rare | €0.58 |
| Underworld DreamsNinth Edition · 167★ | Ninth Edition | 167★ | Rare | $5.02 |
| Underworld DreamsDuels of the Planeswalkers · 35 | Duels of the Planeswalkers | 35 | Rare | €3.24 |
| Underworld DreamsMagic 2010 · 115 | Magic 2010 | 115 | Rare | €1.70 |
| Underworld DreamsTwo-Headed Giant Tournament · 1 | Two-Headed Giant Tournament | 1 | Rare | €7.39 |
| Underworld DreamsSalvat 2011 · 86 | Salvat 2011 | 86 | Rare | €1.39 |
| Underworld DreamsSecret Lair Drop Tokens · 1298 | Secret Lair Drop Tokens | 1298 | Rare | €25.13 |
| Underworld DreamsMagic Online Promos · 35970 | Magic Online Promos | 35970 | Rare | — |
| Underworld SentinelTheros Beyond Death · 293 | Theros Beyond Death | 293 | Rare | €0.24 |
| Undiscovered ParadiseVisions · 167 | Visions | 167 | Rare | €22.50 |
| Undiscovered ParadiseWorld Championship Decks 1997 Tokens · jk167 | World Championship Decks 1997 Tokens | jk167 | Rare | €5.87 |
| Undiscovered ParadiseWorld Championship Decks 1997 Tokens · js167 | World Championship Decks 1997 Tokens | js167 | Rare | $3.67 |
| Undiscovered ParadiseWorld Championship Decks 1997 Tokens · pm167 | World Championship Decks 1997 Tokens | pm167 | Rare | $4.59 |
| Undiscovered ParadiseWorld Championship Decks 1998 Tokens · bs167 | World Championship Decks 1998 Tokens | bs167 | Rare | $3.81 |
| Undiscovered ParadiseMagic Online Promos · 61062 | Magic Online Promos | 61062 | Rare | — |
| Undying FlamesSaviors of Kamigawa · 119 | Saviors of Kamigawa | 119 | Rare | €0.20 |
| UnearthStore Championships · 48 | Store Championships | 48 | Rare | €0.25 |
| UnearthSecret Lair Drop Tokens · 2191 | Secret Lair Drop Tokens | 2191 | Rare | $16.62 |
| Unexpected ConversionAlchemy: Innistrad · 13 | Alchemy: Innistrad | 13 | Rare | — |
| Unexpectedly AbsentCommander 2013 · 25 | Commander 2013 | 25 | Rare | €0.13 |
| Unexpectedly AbsentCommander 2020 · 106 | Commander 2020 | 106 | Rare | $0.32 |
| Unexpectedly AbsentCommander Anthology · 27 | Commander Anthology | 27 | Rare | $0.28 |
| Unexpectedly AbsentEternal Masters · 33 | Eternal Masters | 33 | Rare | $0.25 |
| Unexpected ResultsGatecrash · 203 | Gatecrash | 203 | Rare | €0.41 |
| Unexpected ResultsThe List Tokens · GTC-203 | The List Tokens | GTC-203 | Rare | $0.36 |
| Unexpected ResultsPioneer Masters · 397 | Pioneer Masters | 397 | Rare | — |
| Unexpected WindfallSecret Lair Drop Tokens · 2092 | Secret Lair Drop Tokens | 2092 | Rare | $4.47 |
| Unexplained AbsenceMurders at Karlov Manor Commander · 17 | Murders at Karlov Manor Commander | 17 | Rare | €0.40 |
| Unexplained AbsenceMurders at Karlov Manor Commander · 328 | Murders at Karlov Manor Commander | 328 | Rare | €0.75 |
| Unfinished BusinessFinal Fantasy Commander · 259 | Final Fantasy Commander | 259 | Rare | €0.20 |
| Unfinished BusinessWilds of Eldraine Commander · 8 | Wilds of Eldraine Commander | 8 | Rare | $0.41 |
| Unfinished BusinessWilds of Eldraine Commander · 44 | Wilds of Eldraine Commander | 44 | Rare | €0.50 |
| Unfulfilled DesiresMirage · 285 | Mirage | 285 | Rare | €7.41 |
| Unholy Annex // Ritual ChamberDuskmourn: House of Horror · 118 | Duskmourn: House of Horror | 118 | Rare | €2.04 |
| Unholy Annex // Ritual ChamberDuskmourn: House of Horror · 339 | Duskmourn: House of Horror | 339 | Rare | €2.57 |
| Unholy Annex // Ritual ChamberDuskmourn: House of Horror Promos · 118p | Duskmourn: House of Horror Promos | 118p | Rare | $1.47 |
| Unholy Annex // Ritual ChamberDuskmourn: House of Horror Promos · 118s | Duskmourn: House of Horror Promos | 118s | Rare | €3.49 |
| Unholy GrottoAetherdrift Commander · 182 | Aetherdrift Commander | 182 | Rare | $0.43 |
| Unholy GrottoOnslaught · 327 | Onslaught | 327 | Rare | €4.70 |
| Unholy GrottoThe List Tokens · ONS-327 | The List Tokens | ONS-327 | Rare | €3.47 |
| Unholy Grotto // Unholy GrottoSecret Lair Drop Tokens · 1462 | Secret Lair Drop Tokens | 1462 | Rare | €8.44 |
| Unholy HeatSecret Lair Promo · 4 | Secret Lair Promo | 4 | Rare | $1.24 |
| UnicycleMystery Booster Playtest Cards 2019 · 110 | Mystery Booster Playtest Cards 2019 | 110 | Rare | €0.02 |
| UnicycleMystery Booster Playtest Cards 2021 · 110 | Mystery Booster Playtest Cards 2021 | 110 | Rare | $0.28 |
| Unidentified HovershipDuskmourn: House of Horror · 37 | Duskmourn: House of Horror | 37 | Rare | €0.15 |
| Unidentified HovershipDuskmourn: House of Horror · 305 | Duskmourn: House of Horror | 305 | Rare | €0.21 |
| Unidentified HovershipDuskmourn: House of Horror Promos · 37p | Duskmourn: House of Horror Promos | 37p | Rare | €0.08 |