| Ultimo, Civilization's EndMarvel Super Heroes Commander · 540 | Marvel Super Heroes Commander | 540 | Uncommon | $0.23 |
| Ultron's AuxiliaryMarvel Super Heroes Commander · 669 | Marvel Super Heroes Commander | 669 | Uncommon | €0.48 |
| Ultros, Obnoxious OctopusFinal Fantasy · 83 | Final Fantasy | 83 | Uncommon | €0.10 |
| Ultros, Obnoxious OctopusFinal Fantasy · 442 | Final Fantasy | 442 | Uncommon | €0.99 |
| Ulvenwald MysteriesDouble Masters · 184 | Double Masters | 184 | Uncommon | €0.13 |
| Ulvenwald MysteriesInnistrad Remastered · 222 | Innistrad Remastered | 222 | Uncommon | €0.13 |
| Ulvenwald MysteriesInnistrad Remastered · 423 | Innistrad Remastered | 423 | Uncommon | €0.13 |
| Ulvenwald MysteriesFoundations Jumpstart · 735 | Foundations Jumpstart | 735 | Uncommon | €0.10 |
| Ulvenwald MysteriesMurders at Karlov Manor Commander · 193 | Murders at Karlov Manor Commander | 193 | Uncommon | €0.12 |
| Ulvenwald MysteriesShadows over Innistrad · 236 | Shadows over Innistrad | 236 | Uncommon | $0.07 |
| Ulvenwald MysteriesThe List Tokens · SOI-236 | The List Tokens | SOI-236 | Uncommon | €0.12 |
| Ulvenwald MysteriesJumpstart: Historic Horizons · 661 | Jumpstart: Historic Horizons | 661 | Uncommon | — |
| Ulvenwald MysteriesShadows over Innistrad Remastered · 223 | Shadows over Innistrad Remastered | 223 | Uncommon | — |
| Ulvenwald Mystics // Ulvenwald PrimordialsInnistrad · 208 | Innistrad | 208 | Uncommon | $0.09 |
| Umara MysticZendikar Rising · 238 | Zendikar Rising | 238 | Uncommon | €0.12 |
| Umara Wizard // Umara SkyfallsZendikar Rising · 86 | Zendikar Rising | 86 | Uncommon | €0.17 |
| Umbral Collar ZealotEdge of Eternities · 123 | Edge of Eternities | 123 | Uncommon | $0.37 |
| Umbral Collar ZealotEdge of Eternities · 395 | Edge of Eternities | 395 | Uncommon | $0.51 |
| Umbral Collar ZealotSecrets of Strixhaven Commander · 227 | Secrets of Strixhaven Commander | 227 | Uncommon | $0.37 |
| Umbral JukeStrixhaven: School of Mages · 89 | Strixhaven: School of Mages | 89 | Uncommon | €0.10 |
| Umbral MantleMystery Booster 2 Tokens · 101 | Mystery Booster 2 Tokens | 101 | Uncommon | €5.21 |
| Umbral MantleShadowmoor · 267 | Shadowmoor | 267 | Uncommon | €5.26 |
| Umbral MantleThe List Tokens · SHM-267 | The List Tokens | SHM-267 | Uncommon | €5.48 |
| Unbender TineAlara Reborn · 15 | Alara Reborn | 15 | Uncommon | $0.25 |
| Unbender TineArchenemy · 97 | Archenemy | 97 | Uncommon | €0.09 |
| Unbreakable BondIkoria: Lair of Behemoths · 101 | Ikoria: Lair of Behemoths | 101 | Uncommon | €0.09 |
| Unbreakable RemnantAlchemy: Secrets of Strixhaven · 2 | Alchemy: Secrets of Strixhaven | 2 | Uncommon | — |
| Unburial RitesDouble Masters 2022 · 95 | Double Masters 2022 | 95 | Uncommon | €0.26 |
| Unburial RitesForgotten Realms Commander · 111 | Forgotten Realms Commander | 111 | Uncommon | €0.17 |
| Unburial RitesCommander 2020 · 139 | Commander 2020 | 139 | Uncommon | €0.19 |
| Unburial RitesInnistrad · 122 | Innistrad | 122 | Uncommon | €0.05 |
| Unburial RitesModern Masters 2017 · 85 | Modern Masters 2017 | 85 | Uncommon | €0.18 |
| Unburial RitesThe List Tokens · ISD-122 | The List Tokens | ISD-122 | Uncommon | €0.17 |
| Unburial RitesUltimate Masters · 119 | Ultimate Masters | 119 | Uncommon | €0.11 |
| Unburial RitesHistoric Anthology 3 · 14 | Historic Anthology 3 | 14 | Uncommon | — |
| Unburial RitesShadows of the Past · 36 | Shadows of the Past | 36 | Uncommon | — |
| UnburyLorwyn Eclipsed · 123 | Lorwyn Eclipsed | 123 | Uncommon | €0.11 |
| Uncaged FuryInnistrad Remastered · 177 | Innistrad Remastered | 177 | Uncommon | €0.09 |
| Uncaged FuryFoundations Jumpstart · 607 | Foundations Jumpstart | 607 | Uncommon | €0.07 |
| Uncaged FuryCore Set 2020 · 163 | Core Set 2020 | 163 | Uncommon | €0.04 |
| Uncaged FuryShadows over Innistrad Remastered · 183 | Shadows over Innistrad Remastered | 183 | Uncommon | — |
| Unchained BerserkerCore Set 2020 · 164 | Core Set 2020 | 164 | Uncommon | €0.08 |
| Unchained BerserkerThe List Tokens · M20-164 | The List Tokens | M20-164 | Uncommon | $0.10 |
| Unchecked GrowthBetrayers of Kamigawa · 148 | Betrayers of Kamigawa | 148 | Uncommon | €0.07 |
| Unclaimed Battle AxeUnknown Event · UR02c | Unknown Event | UR02c | Uncommon | — |
| Unclaimed TerritoryWarhammer 40,000 Commander · 304 | Warhammer 40,000 Commander | 304 | Uncommon | €0.81 |
| Unclaimed TerritoryWarhammer 40,000 Commander · 304★ | Warhammer 40,000 Commander | 304★ | Uncommon | $8.01 |
| Unclaimed TerritoryCommander 2020 · 320 | Commander 2020 | 320 | Uncommon | €0.30 |
| Unclaimed TerritoryCommander Masters · 1050 | Commander Masters | 1050 | Uncommon | $0.35 |
| Unclaimed TerritoryLorwyn Eclipsed Commander · 175 | Lorwyn Eclipsed Commander | 175 | Uncommon | $0.31 |