| Unbound FlourishingThe List Tokens · MH1-189 | The List Tokens | MH1-189 | Mythic Rare | €11.86 |
| Uncage the MenagerieHour of Devastation · 137 | Hour of Devastation | 137 | Mythic Rare | $0.88 |
| Uncage the MenagerieHour of Devastation Promos · 137s | Hour of Devastation Promos | 137s | Mythic Rare | €2.69 |
| Underbridge WarlockAlchemy: Wilds of Eldraine · 8 | Alchemy: Wilds of Eldraine | 8 | Mythic Rare | — |
| Undercity SewersTeenage Mutant Ninja Turtles Source Material · 20 | Teenage Mutant Ninja Turtles Source Material | 20 | Mythic Rare | $8.40 |
| Undergrowth ChampionBattle for Zendikar · 197 | Battle for Zendikar | 197 | Mythic Rare | €0.67 |
| Undergrowth ChampionFoundations Jumpstart · 736 | Foundations Jumpstart | 736 | Mythic Rare | $0.37 |
| Undergrowth ChampionBattle for Zendikar Promos · 197s | Battle for Zendikar Promos | 197s | Mythic Rare | €3.76 |
| Undergrowth ReconMurders at Karlov Manor · 181 | Murders at Karlov Manor | 181 | Mythic Rare | $1.72 |
| Undergrowth ReconMurders at Karlov Manor · 411 | Murders at Karlov Manor | 411 | Mythic Rare | €2.41 |
| Undergrowth ReconMurders at Karlov Manor Promos · 181p | Murders at Karlov Manor Promos | 181p | Mythic Rare | €1.64 |
| Undergrowth ReconMurders at Karlov Manor Promos · 181s | Murders at Karlov Manor Promos | 181s | Mythic Rare | €4.05 |
| Underrealm LichRavnica: Clue Edition · 215 | Ravnica: Clue Edition | 215 | Mythic Rare | €7.06 |
| Underrealm LichGuilds of Ravnica · 211 | Guilds of Ravnica | 211 | Mythic Rare | €6.57 |
| Underrealm LichGuilds of Ravnica Promos · 211p | Guilds of Ravnica Promos | 211p | Mythic Rare | €5.67 |
| Underrealm LichGuilds of Ravnica Promos · 211s | Guilds of Ravnica Promos | 211s | Mythic Rare | €5.93 |
| Underworld BreachTeenage Mutant Ninja Turtles Source Material · 10 | Teenage Mutant Ninja Turtles Source Material | 10 | Mythic Rare | $7.09 |
| Underworld CerberusTheros · 208 | Theros | 208 | Mythic Rare | €0.33 |
| Unesh, Criosphinx SovereignHour of Devastation · 52 | Hour of Devastation | 52 | Mythic Rare | €6.25 |
| Unesh, Criosphinx SovereignHour of Devastation Promos · 52s | Hour of Devastation Promos | 52s | Mythic Rare | €4.05 |
| Unesh, Criosphinx SovereignAmonkhet Remastered · 85 | Amonkhet Remastered | 85 | Mythic Rare | — |
| Unexpected WindfallMarvel Universe · 29 | Marvel Universe | 29 | Mythic Rare | €4.27 |
| Unholy HeatSpecial Guests · 71 | Special Guests | 71 | Mythic Rare | $1.47 |
| United FrontAvatar: The Last Airbender Promos · 39s | Avatar: The Last Airbender Promos | 39s | Mythic Rare | €5.87 |
| United FrontAvatar: The Last Airbender · 39 | Avatar: The Last Airbender | 39 | Mythic Rare | $1.84 |
| United FrontAvatar: The Last Airbender · 331 | Avatar: The Last Airbender | 331 | Mythic Rare | €3.34 |
| UnmaskFrom the Vault: Lore Tokens · 15 | From the Vault: Lore Tokens | 15 | Mythic Rare | $7.16 |
| Unnatural GrowthMarvel Universe · 84 | Marvel Universe | 84 | Mythic Rare | €1.48 |
| UpheavalFrom the Vault: Annihilation · 13 | From the Vault: Annihilation | 13 | Mythic Rare | €0.57 |
| UpheavalVintage Masters · 100 | Vintage Masters | 100 | Mythic Rare | — |
| Urabrask, Heretic PraetorStreets of New Capenna Promos · 129p | Streets of New Capenna Promos | 129p | Mythic Rare | $2.58 |
| Urabrask, Heretic PraetorStreets of New Capenna Promos · 129s | Streets of New Capenna Promos | 129s | Mythic Rare | €4.08 |
| Urabrask, Heretic PraetorStreets of New Capenna · 129 | Streets of New Capenna | 129 | Mythic Rare | $1.96 |
| Urabrask, Heretic PraetorStreets of New Capenna · 346 | Streets of New Capenna | 346 | Mythic Rare | €2.45 |
| Urabrask, Heretic PraetorStreets of New Capenna · 360 | Streets of New Capenna | 360 | Mythic Rare | $1.50 |
| Urabrask, Heretic PraetorStreets of New Capenna · 446 | Streets of New Capenna | 446 | Mythic Rare | €0.02 |
| Urabrask, Heretic PraetorStreets of New Capenna · 468 | Streets of New Capenna | 468 | Mythic Rare | €5.30 |
| Urabrask, Heretic PraetorStreets of New Capenna · 469 | Streets of New Capenna | 469 | Mythic Rare | €11.10 |
| Urabrask // The Great WorkMarch of the Machine · 169 | March of the Machine | 169 | Mythic Rare | €14.20 |
| Urabrask // The Great WorkMarch of the Machine · 299 | March of the Machine | 299 | Mythic Rare | €14.23 |
| Urabrask // The Great WorkMarch of the Machine · 341 | March of the Machine | 341 | Mythic Rare | €997.44 |
| Urabrask // The Great WorkMarch of the Machine Promos · 169s | March of the Machine Promos | 169s | Mythic Rare | €16.32 |
| Urabrask the HiddenCommander Legends: Battle for Baldur's Gate · 811 | Commander Legends: Battle for Baldur's Gate | 811 | Mythic Rare | €1.30 |
| Urabrask the HiddenIconic Masters · 152 | Iconic Masters | 152 | Mythic Rare | €2.09 |
| Urabrask the HiddenMultiverse Legends · 23 | Multiverse Legends | 23 | Mythic Rare | €2.66 |
| Urabrask the HiddenMultiverse Legends · 88 | Multiverse Legends | 88 | Mythic Rare | €6.42 |
| Urabrask the HiddenMultiverse Legends · 153 | Multiverse Legends | 153 | Mythic Rare | €27.47 |
| Urabrask the HiddenMultiverse Legends · 153z | Multiverse Legends | 153z | Mythic Rare | €241.84 |
| Urabrask the HiddenNew Phyrexia · 98 | New Phyrexia | 98 | Mythic Rare | €2.57 |
| Urabrask the HiddenSecret Lair Drop Tokens · 212 | Secret Lair Drop Tokens | 212 | Mythic Rare | €2.44 |