| Orcish BowmastersThe Hobbit Eternal · 19 | The Hobbit Eternal | 19 | Mythic Rare | €42.28 |
| Orcish BowmastersThe Hobbit Eternal · 59 | The Hobbit Eternal | 59 | Mythic Rare | €116.18 |
| Orcrist, Goblin-cleaverThe Hobbit · 177 | The Hobbit | 177 | Mythic Rare | $7.86 |
| Orcrist, Goblin-cleaverThe Hobbit · 236 | The Hobbit | 236 | Mythic Rare | €12.21 |
| Orcrist, Goblin-cleaverThe Hobbit · 272 | The Hobbit | 272 | Mythic Rare | €49.39 |
| Ormacar, Relic Wraith2023 Heroes of the Realm · 2 | 2023 Heroes of the Realm | 2 | Mythic Rare | — |
| Ornate ImitationsAlchemy: Aetherdrift · 23 | Alchemy: Aetherdrift | 23 | Mythic Rare | — |
| Orvar, the All-FormKaldheim · 70 | Kaldheim | 70 | Mythic Rare | €2.66 |
| Orvar, the All-FormKaldheim · 305 | Kaldheim | 305 | Mythic Rare | $2.99 |
| Orvar, the All-FormKaldheim Promos · 70p | Kaldheim Promos | 70p | Mythic Rare | $3.23 |
| Orvar, the All-FormKaldheim Promos · 70s | Kaldheim Promos | 70s | Mythic Rare | €6.78 |
| Orvar, the All-FormSecret Lair Drop Tokens · 1683 | Secret Lair Drop Tokens | 1683 | Mythic Rare | €4.79 |
| Orvar, the All-FormThe List Tokens · KHM-305 | The List Tokens | KHM-305 | Mythic Rare | $4.01 |
| Orvar, the All-FormMagic Online Promos · 88234 | Magic Online Promos | 88234 | Mythic Rare | — |
| Orvar, the All-FormSecret Lair Drop Tokens · 2867 | Secret Lair Drop Tokens | 2867 | Mythic Rare | $4.97 |
| Osgir, the ReconstructorCommander 2021 · 8 | Commander 2021 | 8 | Mythic Rare | €0.53 |
| Osgir, the ReconstructorCommander 2021 · 335 | Commander 2021 | 335 | Mythic Rare | €2.48 |
| Osgir, the ReconstructorCommander 2021 Display Commanders · 8 | Commander 2021 Display Commanders | 8 | Mythic Rare | $0.23 |
| Osgir, the ReconstructorMagic Online Promos · 90284 | Magic Online Promos | 90284 | Mythic Rare | — |
| Otharri, Suns' GloryPhyrexia: All Will Be One Commander · 3 | Phyrexia: All Will Be One Commander | 3 | Mythic Rare | $5.46 |
| Otharri, Suns' GloryPhyrexia: All Will Be One Commander · 39 | Phyrexia: All Will Be One Commander | 39 | Mythic Rare | $8.00 |
| Otharri, Suns' GloryThe List Tokens · ONC-3 | The List Tokens | ONC-3 | Mythic Rare | — |
| Otrimi, the Ever-PlayfulCommander 2020 · 12 | Commander 2020 | 12 | Mythic Rare | €0.92 |
| Otrimi, the Ever-PlayfulCommander 2020 Oversized · 12 | Commander 2020 Oversized | 12 | Mythic Rare | €0.15 |
| OuroboroidEdge of Eternities · 201 | Edge of Eternities | 201 | Mythic Rare | €31.94 |
| OuroboroidEdge of Eternities · 345 | Edge of Eternities | 345 | Mythic Rare | €37.59 |
| OuroboroidEdge of Eternities Promos · 201p | Edge of Eternities Promos | 201p | Mythic Rare | €30.02 |
| OuroboroidEdge of Eternities Promos · 201s | Edge of Eternities Promos | 201s | Mythic Rare | €40.90 |
| Outlaws' MerrimentThrone of Eldraine · 198 | Throne of Eldraine | 198 | Mythic Rare | $0.45 |
| Outlaws' MerrimentThrone of Eldraine · 382 | Throne of Eldraine | 382 | Mythic Rare | €1.25 |
| Outlaws' MerrimentThrone of Eldraine Promos · 198p | Throne of Eldraine Promos | 198p | Mythic Rare | $0.59 |
| Outlaws' MerrimentThrone of Eldraine Promos · 198s | Throne of Eldraine Promos | 198s | Mythic Rare | $1.16 |
| Outlaws' MerrimentThe List Tokens · ELD-198 | The List Tokens | ELD-198 | Mythic Rare | €0.50 |
| OvercookedAlchemy: Wilds of Eldraine · 11 | Alchemy: Wilds of Eldraine | 11 | Mythic Rare | — |
| Overflowing InsightFoundations Jumpstart · 341 | Foundations Jumpstart | 341 | Mythic Rare | $0.32 |
| Overflowing InsightIxalan Promos · 66s | Ixalan Promos | 66s | Mythic Rare | €1.48 |
| Overflowing InsightIxalan · 66 | Ixalan | 66 | Mythic Rare | $0.36 |
| Overflowing InsightArena New Player Experience Extras · 16 | Arena New Player Experience Extras | 16 | Mythic Rare | — |
| Overgrown TombZendikar Expeditions · 13 | Zendikar Expeditions | 13 | Mythic Rare | €60.82 |
| Overlord of the BalemurkDuskmourn: House of Horror · 113 | Duskmourn: House of Horror | 113 | Mythic Rare | $21.08 |
| Overlord of the BalemurkDuskmourn: House of Horror · 377 | Duskmourn: House of Horror | 377 | Mythic Rare | $21.89 |
| Overlord of the BalemurkDuskmourn: House of Horror · 391 | Duskmourn: House of Horror | 391 | Mythic Rare | €55.24 |
| Overlord of the BalemurkDuskmourn: House of Horror · 401 | Duskmourn: House of Horror | 401 | Mythic Rare | €217.83 |
| Overlord of the BalemurkDuskmourn: House of Horror Promos · 113p | Duskmourn: House of Horror Promos | 113p | Mythic Rare | €18.81 |
| Overlord of the BalemurkDuskmourn: House of Horror Promos · 113s | Duskmourn: House of Horror Promos | 113s | Mythic Rare | €27.83 |
| Overlord of the BoilerbilgesDuskmourn: House of Horror · 146 | Duskmourn: House of Horror | 146 | Mythic Rare | €1.86 |
| Overlord of the BoilerbilgesDuskmourn: House of Horror · 380 | Duskmourn: House of Horror | 380 | Mythic Rare | $2.29 |
| Overlord of the BoilerbilgesDuskmourn: House of Horror · 393 | Duskmourn: House of Horror | 393 | Mythic Rare | €12.32 |
| Overlord of the BoilerbilgesDuskmourn: House of Horror · 403 | Duskmourn: House of Horror | 403 | Mythic Rare | €42.91 |
| Overlord of the BoilerbilgesDuskmourn: House of Horror Promos · 146p | Duskmourn: House of Horror Promos | 146p | Mythic Rare | €2.10 |