| Olórin's Searing LightTales of Middle-earth Commander · 503 | Tales of Middle-earth Commander | 503 | Rare | $6.02 |
| Olórin's Searing LightTales of Middle-earth Commander · 547 | Tales of Middle-earth Commander | 547 | Rare | $16.21 |
| Olórin's Searing Light // Olórin's Searing LightTales of Middle-earth Scene Box · 13 | Tales of Middle-earth Scene Box | 13 | — | $0.25 |
| Oloro, Ageless AsceticCommander 2013 · 203 | Commander 2013 | 203 | Mythic Rare | €8.72 |
| Oloro, Ageless AsceticJudge Gift Cards 2014 · 9 | Judge Gift Cards 2014 | 9 | Rare | €36.73 |
| Oloro, Ageless AsceticCommander 2013 Oversized · 203 | Commander 2013 Oversized | 203 | Mythic Rare | €0.73 |
| Oloro, Ageless AsceticSecret Lair Drop Tokens · 1962 | Secret Lair Drop Tokens | 1962 | Mythic Rare | €12.74 |
| Oloro, Ageless AsceticThe List Tokens · C13-203 | The List Tokens | C13-203 | Mythic Rare | €14.34 |
| Oloro, Ageless AsceticMagic Online Promos · 52316 | Magic Online Promos | 52316 | Mythic Rare | — |
| Oltec ArchaeologistsThe Lost Caverns of Ixalan · 27 | The Lost Caverns of Ixalan | 27 | Common | €0.02 |
| Oltec Cloud GuardThe Lost Caverns of Ixalan · 28 | The Lost Caverns of Ixalan | 28 | Common | €0.04 |
| Oltec MatterweaverThe Big Score · 3 | The Big Score | 3 | Mythic Rare | €1.83 |
| Oltec MatterweaverThe Big Score · 33 | The Big Score | 33 | Mythic Rare | €5.63 |
| Oltec MatterweaverThe Big Score · 68 | The Big Score | 68 | Mythic Rare | €3.23 |
| Oltec MatterweaverWizards Play Network 2024 · 12 | Wizards Play Network 2024 | 12 | Mythic Rare | $0.89 |
| Omarthis, Ghostfire InitiateCommander Masters · 708 | Commander Masters | 708 | Mythic Rare | €0.94 |
| Omarthis, Ghostfire InitiateCommander Masters · 748 | Commander Masters | 748 | Mythic Rare | €2.69 |
| Omashu CityAvatar: The Last Airbender · 275 | Avatar: The Last Airbender | 275 | Common | €0.07 |
| Omega, Heartless EvolutionFinal Fantasy · 236 | Final Fantasy | 236 | Uncommon | €0.07 |
| Omega, Heartless EvolutionFinal Fantasy · 347 | Final Fantasy | 347 | Uncommon | €0.23 |
| Omega, Heartless EvolutionFinal Fantasy · 501 | Final Fantasy | 501 | Uncommon | $0.72 |
| Omega MyrMirrodin · 223 | Mirrodin | 223 | Common | $0.14 |
| OmenPortal · 62 | Portal | 62 | Common | €0.19 |
| OmenThe List Tokens · POR-62 | The List Tokens | POR-62 | Common | €0.09 |
| Omen HawkerMarch of the Machine · 70 | March of the Machine | 70 | Uncommon | €0.16 |
| Omen MachineNew Phyrexia · 148 | New Phyrexia | 148 | Rare | €0.95 |
| Omen of FireAlliances · 75 | Alliances | 75 | Rare | €1.31 |
| Omen of the DeadTheros Beyond Death · 110 | Theros Beyond Death | 110 | Common | €0.09 |
| Omen of the ForgeTheros Beyond Death · 145 | Theros Beyond Death | 145 | Common | €0.06 |
| Omen of the HuntCommander Masters · 906 | Commander Masters | 906 | Common | €0.14 |
| Omen of the HuntTheros Beyond Death · 192 | Theros Beyond Death | 192 | Common | €0.11 |
| Omen of the SeaFoundations Jumpstart · 336 | Foundations Jumpstart | 336 | Common | €0.20 |
| Omen of the SeaThe List Tokens · THB-58 | The List Tokens | THB-58 | Common | €0.09 |
| Omen of the SeaTheros Beyond Death · 58 | Theros Beyond Death | 58 | Common | €0.13 |
| Omen of the SunCommander Masters · 831 | Commander Masters | 831 | Common | €0.13 |
| Omen of the SunThe List Tokens · THB-30 | The List Tokens | THB-30 | Common | €0.05 |
| Omen of the SunTheros Beyond Death · 30 | Theros Beyond Death | 30 | Common | €0.04 |
| Omenpath InstabilityBlack Lotus Unknown Planechase · PLA032 | Black Lotus Unknown Planechase | PLA032 | Common | — |
| Omenpath JourneyThe Big Score · 18 | The Big Score | 18 | Mythic Rare | $1.82 |
| Omenpath JourneyThe Big Score · 48 | The Big Score | 48 | Mythic Rare | $8.83 |
| Omenpath JourneyThe Big Score · 83 | The Big Score | 83 | Mythic Rare | €4.56 |
| Omenpath JourneyThe Big Score Promos · 18p | The Big Score Promos | 18p | Mythic Rare | €1.37 |
| Omenpath to NayaMystery Booster 2 Tokens · 616 | Mystery Booster 2 Tokens | 616 | Rare | $0.19 |
| Omenport VigilanteOutlaws of Thunder Junction · 21 | Outlaws of Thunder Junction | 21 | Uncommon | €0.04 |
| Omenport Vigilante // Omenport VigilanteOutlaws of Thunder Junction Art Series · 3 | Outlaws of Thunder Junction Art Series | 3 | — | — |
| OmenspeakerBattlebond · 125 | Battlebond | 125 | Common | €0.06 |
| OmenspeakerConspiracy: Take the Crown · 118 | Conspiracy: Take the Crown | 118 | Common | €0.02 |
| OmenspeakerCommander Legends · 83 | Commander Legends | 83 | Common | €0.04 |
| OmenspeakerDuel Decks: Elspeth vs. Kiora Tokens · 39 | Duel Decks: Elspeth vs. Kiora Tokens | 39 | Common | €0.04 |
| OmenspeakerCore Set 2019 · 64 | Core Set 2019 | 64 | Common | €0.06 |