| Omnath, Locus of RageEdge of Eternities Commander · 123 | Edge of Eternities Commander | 123 | Mythic Rare | $0.32 |
| Omnath, Locus of RageOutlaws of Thunder Junction Commander · 236 | Outlaws of Thunder Junction Commander | 236 | Mythic Rare | €0.59 |
| Omnath, Locus of RageBattle for Zendikar Promos · 217p | Battle for Zendikar Promos | 217p | Mythic Rare | €0.85 |
| Omnath, Locus of RageBattle for Zendikar Promos · 217s | Battle for Zendikar Promos | 217s | Mythic Rare | €2.47 |
| Omnath, Locus of RageSecret Lair Drop Tokens · 1256 | Secret Lair Drop Tokens | 1256 | Mythic Rare | €22.49 |
| Omnath, Locus of RageThe List Tokens · BFZ-217 | The List Tokens | BFZ-217 | Mythic Rare | €3.58 |
| Omnath, Locus of RageZendikar Rising Commander · 97 | Zendikar Rising Commander | 97 | Mythic Rare | $0.48 |
| Omnath, Locus of RageExplorer Anthology 3 · 17 | Explorer Anthology 3 | 17 | Mythic Rare | — |
| Omnath, Locus of the RoilLorwyn Eclipsed Commander · 130 | Lorwyn Eclipsed Commander | 130 | Mythic Rare | €0.50 |
| Omnath, Locus of the RoilCore Set 2020 · 216 | Core Set 2020 | 216 | Mythic Rare | €0.97 |
| Omnath, Locus of the RoilCore Set 2020 Promos · 216p | Core Set 2020 Promos | 216p | Mythic Rare | €6.33 |
| Omnath, Locus of the RoilCore Set 2020 Promos · 216s | Core Set 2020 Promos | 216s | Mythic Rare | €9.03 |
| OmnipresenceReality Fracture · 110 | Reality Fracture | 110 | Mythic Rare | €0.54 |
| OmnipresenceReality Fracture · 331 | Reality Fracture | 331 | Mythic Rare | €1.60 |
| OmnipresenceReality Fracture · 448 | Reality Fracture | 448 | Mythic Rare | — |
| OmnipresenceReality Fracture · 459 | Reality Fracture | 459 | Mythic Rare | €183.98 |
| OmnipresenceReality Fracture Promos · 110p | Reality Fracture Promos | 110p | Mythic Rare | €2.00 |
| OmniscienceFoundations · 161 | Foundations | 161 | Mythic Rare | €4.90 |
| OmniscienceFoundations · 312 | Foundations | 312 | Mythic Rare | €9.34 |
| OmniscienceFoundations · 379 | Foundations | 379 | Mythic Rare | €53.99 |
| OmniscienceMagic 2013 · 63 | Magic 2013 | 63 | Mythic Rare | €5.54 |
| OmniscienceCore Set 2019 · 65 | Core Set 2019 | 65 | Mythic Rare | €5.06 |
| OmniscienceFoundations Promos · 161s | Foundations Promos | 161s | Mythic Rare | €6.37 |
| OmniscienceCore Set 2019 Promos · 65s | Core Set 2019 Promos | 65s | Mythic Rare | €10.06 |
| OmniscienceWilds of Eldraine: Enchanting Tales · 24 | Wilds of Eldraine: Enchanting Tales | 24 | Mythic Rare | €7.02 |
| OmniscienceWilds of Eldraine: Enchanting Tales · 70 | Wilds of Eldraine: Enchanting Tales | 70 | Mythic Rare | €21.54 |
| OmniscienceWilds of Eldraine: Enchanting Tales · 90 | Wilds of Eldraine: Enchanting Tales | 90 | Mythic Rare | €245.05 |
| Omo, Queen of VesuvaModern Horizons 3 Commander · 2 | Modern Horizons 3 Commander | 2 | Mythic Rare | €0.28 |
| Omo, Queen of VesuvaModern Horizons 3 Commander · 14 | Modern Horizons 3 Commander | 14 | Mythic Rare | €0.79 |
| Omo, Queen of VesuvaModern Horizons 3 Commander · 22 | Modern Horizons 3 Commander | 22 | Mythic Rare | €0.45 |
| Omo, Queen of VesuvaModern Horizons 3 Commander · 30 | Modern Horizons 3 Commander | 30 | Mythic Rare | €0.37 |
| Omo, Queen of VesuvaModern Horizons 3 Commander · 141 | Modern Horizons 3 Commander | 141 | Mythic Rare | €4.11 |
| Omo, Queen of VesuvaModern Horizons 3 Commander · 145 | Modern Horizons 3 Commander | 145 | Mythic Rare | €0.02 |
| Omo, Queen of VesuvaModern Horizons 3 Commander · 149 | Modern Horizons 3 Commander | 149 | Mythic Rare | $0.18 |
| One with the MultiverseThe Brothers' War · 59 | The Brothers' War | 59 | Mythic Rare | €2.63 |
| One with the MultiverseThe Brothers' War · 316 | The Brothers' War | 316 | Mythic Rare | €4.46 |
| One with the MultiverseDuskmourn: House of Horror Commander · 121 | Duskmourn: House of Horror Commander | 121 | Mythic Rare | $2.16 |
| One with the MultiverseThe Brothers' War Promos Tokens · 59p | The Brothers' War Promos Tokens | 59p | Mythic Rare | €2.48 |
| One with the MultiverseThe Brothers' War Promos Tokens · 59s | The Brothers' War Promos Tokens | 59s | Mythic Rare | €5.27 |
| One with the MultiverseMagic Online Promos · 105682 | Magic Online Promos | 105682 | Mythic Rare | — |
| Oona, Queen of the FaeSecret Lair Drop Tokens · 54 | Secret Lair Drop Tokens | 54 | Mythic Rare | €10.36 |
| Oona, Queen of the FaeFrom the Vault: Legends · 8 | From the Vault: Legends | 8 | Mythic Rare | €1.30 |
| Opening CeremonyUnfinity · 118 | Unfinity | 118 | Mythic Rare | €0.31 |
| Opening CeremonyUnfinity · 404 | Unfinity | 404 | Mythic Rare | $0.89 |
| Opposition AgentMarvel Universe · 19 | Marvel Universe | 19 | Mythic Rare | $21.34 |
| Opposition AgentThrough the Omenpaths Bonus Sheet · 19 | Through the Omenpaths Bonus Sheet | 19 | Mythic Rare | — |
| Optimus Prime, Hero // Optimus Prime, Autobot LeaderTransformers · 13 | Transformers | 13 | Mythic Rare | €1.83 |
| Optimus Prime, Hero // Optimus Prime, Autobot LeaderTransformers · 27 | Transformers | 27 | Mythic Rare | €34.19 |
| Optimus Prime, Inspiring Leader2018 Heroes of the Realm · 2 | 2018 Heroes of the Realm | 2 | Mythic Rare | — |
| Oracle of the AlphaAlchemy: Dominaria · 4 | Alchemy: Dominaria | 4 | Mythic Rare | — |