| Orzhov GuildgateRavnica Remastered · 282 | Ravnica Remastered | 282 | Common | €0.15 |
| Orzhov GuildgateRavnica Remastered · 406 | Ravnica Remastered | 406 | Common | €0.14 |
| Orzhov GuildgateThe List Tokens · RNA-253 | The List Tokens | RNA-253 | Common | €0.14 |
| Orzhov GuildgateWar of the Spark · 269 | War of the Spark | 269 | Common | €0.05 |
| Orzhov GuildgatePioneer Masters · 271 | Pioneer Masters | 271 | Common | — |
| Orzhov LocketMarch of the Machine Commander · 368 | March of the Machine Commander | 368 | Common | €0.27 |
| Orzhov LocketRavnica Allegiance · 236 | Ravnica Allegiance | 236 | Common | €0.03 |
| Orzhov SignetThe Brothers' War Commander · 154 | The Brothers' War Commander | 154 | Common | €0.54 |
| Orzhov SignetCommander 2015 · 262 | Commander 2015 | 262 | Common | $0.36 |
| Orzhov SignetCommander 2016 · 266 | Commander 2016 | 266 | Common | $0.34 |
| Orzhov SignetCommander 2018 · 213 | Commander 2018 | 213 | Common | $0.38 |
| Orzhov SignetRavnica: Clue Edition · 225 | Ravnica: Clue Edition | 225 | Common | $0.34 |
| Orzhov SignetCommander Anthology Volume II · 206 | Commander Anthology Volume II | 206 | Common | €0.55 |
| Orzhov SignetCommander Anthology · 223 | Commander Anthology | 223 | Common | €0.24 |
| Orzhov SignetCommander 2011 · 255 | Commander 2011 | 255 | Common | €0.16 |
| Orzhov SignetCommander Legends: Battle for Baldur's Gate · 867 | Commander Legends: Battle for Baldur's Gate | 867 | Common | €0.38 |
| Orzhov SignetRNA Guild Kit · 48 | RNA Guild Kit | 48 | Common | $0.40 |
| Orzhov SignetGuildpact · 155 | Guildpact | 155 | Common | €0.31 |
| Orzhov SignetMarch of the Machine Commander · 369 | March of the Machine Commander | 369 | Common | €0.44 |
| Orzhov SignetTarkir: Dragonstorm Commander · 323 | Tarkir: Dragonstorm Commander | 323 | Common | $0.39 |
| Orzhov SignetMagic Online Promos · 62399 | Magic Online Promos | 62399 | Common | — |
| Osai VulturesLegends · 29 | Legends | 29 | Common | $0.46 |
| Osai VulturesRenaissance · 16 | Renaissance | 16 | Common | €0.08 |
| Osai VulturesMasters Edition IV · 21 | Masters Edition IV | 21 | Common | — |
| _____-o-saurusUnfinity · 148 | Unfinity | 148 | Common | €0.07 |
| _____-o-saurusUnfinity · 434 | Unfinity | 434 | Common | $0.36 |
| Oscorp Research TeamMarvel's Spider-Man · 40 | Marvel's Spider-Man | 40 | Common | €0.05 |
| Oscorp Research TeamThrough the Omenpaths · 40 | Through the Omenpaths | 40 | Common | — |
| Osseous ExhaleTarkir: Dragonstorm · 17 | Tarkir: Dragonstorm | 17 | Common | €0.06 |
| Ossuary RatsJumpstart 2022 · 24 | Jumpstart 2022 | 24 | Common | €0.11 |
| Ostiary ThrullGuildpact · 55 | Guildpact | 55 | Common | €0.09 |
| OstracizeSeventh Edition · 153 | Seventh Edition | 153 | Common | $0.12 |
| OstracizeSeventh Edition · 153★ | Seventh Edition | 153★ | Common | $0.12 |
| OstracizeUrza's Legacy · 57 | Urza's Legacy | 57 | Common | $0.13 |
| Ostrich-HorseAvatar: The Last Airbender · 188 | Avatar: The Last Airbender | 188 | Common | €0.02 |
| OtariaPlanechase Planes · 28 | Planechase Planes | 28 | Common | €2.10 |
| OtariaPlanechase Anthology Planes · 61 | Planechase Anthology Planes | 61 | Common | €0.40 |
| OteclánBlack Lotus Unknown Planechase · PLA018 | Black Lotus Unknown Planechase | PLA018 | Common | — |
| Oteclan Landmark // Oteclan LevitatorThe Lost Caverns of Ixalan · 29 | The Lost Caverns of Ixalan | 29 | Common | €0.06 |
| Otherworldly GazeInnistrad: Double Feature · 67 | Innistrad: Double Feature | 67 | Common | €1.62 |
| Otherworldly GazeDuskmourn: House of Horror Commander · 122 | Duskmourn: House of Horror Commander | 122 | Common | $0.33 |
| Otherworldly GazeInnistrad: Midnight Hunt · 67 | Innistrad: Midnight Hunt | 67 | Common | $0.37 |
| Otherworldly GazeMurders at Karlov Manor Commander · 115 | Murders at Karlov Manor Commander | 115 | Common | $0.33 |
| Otherworldly JourneyModern Masters 2015 · 30 | Modern Masters 2015 | 30 | Common | €0.13 |
| Otherworldly JourneyModern Masters · 23 | Modern Masters | 23 | Common | €0.18 |
| Otherworldly OutburstEldritch Moon · 138 | Eldritch Moon | 138 | Common | €0.16 |
| Otter-PenguinAvatar: The Last Airbender · 67 | Avatar: The Last Airbender | 67 | Common | €0.07 |
| OublietteArabian Nights · 31 | Arabian Nights | 31 | Common | €22.70 |
| OublietteArabian Nights · 31† | Arabian Nights | 31† | Common | $22.89 |
| OublietteMasters Edition · 79 | Masters Edition | 79 | Common | — |