| Ogre SavantDuel Decks: Izzet vs. Golgari · 9 | Duel Decks: Izzet vs. Golgari | 9 | Common | €0.05 |
| Ogre SavantGuildpact · 70 | Guildpact | 70 | Common | €0.05 |
| Ogre SentryConspiracy: Take the Crown · 168 | Conspiracy: Take the Crown | 168 | Common | €0.02 |
| Ogre SentryRise of the Eldrazi · 159 | Rise of the Eldrazi | 159 | Common | €0.04 |
| Ogre TaskmasterMasters Edition IV · 128 | Masters Edition IV | 128 | Common | — |
| Ogre WarriorPortal Second Age · 113 | Portal Second Age | 113 | Common | €0.19 |
| Ogre WarriorStarter 2000 · 33 | Starter 2000 | 33 | Common | €0.11 |
| Ogre WarriorStarter 1999 · 113 | Starter 1999 | 113 | Common | $0.10 |
| Ohran YetiColdsnap · 93 | Coldsnap | 93 | Common | $0.09 |
| Oil-Gorger TrollPhyrexia: All Will Be One · 177 | Phyrexia: All Will Be One | 177 | Common | €0.06 |
| Óin the BraveThe Hobbit · 106 | The Hobbit | 106 | Common | €0.06 |
| Ojutai InterceptorDragons of Tarkir · 66 | Dragons of Tarkir | 66 | Common | €0.02 |
| Ojutai InterceptorThe List Tokens · DTK-66 | The List Tokens | DTK-66 | Common | €0.05 |
| Ojutai's BreathDragons of Tarkir · 67 | Dragons of Tarkir | 67 | Common | $0.05 |
| Ojutai's BreathIconic Masters · 68 | Iconic Masters | 68 | Common | €0.07 |
| Ojutai's BreathThe List Tokens · DTK-67 | The List Tokens | DTK-67 | Common | €0.15 |
| Ojutai's SummonsDragons of Tarkir · 68 | Dragons of Tarkir | 68 | Common | €0.02 |
| Ojutai's SummonsJumpstart: Historic Horizons · 224 | Jumpstart: Historic Horizons | 224 | Common | — |
| Oketra's AvengerHour of Devastation · 17 | Hour of Devastation | 17 | Common | $0.04 |
| Oketra's AvengerAmonkhet Remastered · 29 | Amonkhet Remastered | 29 | Common | — |
| Okiba-Gang ShinobiBetrayers of Kamigawa · 76 | Betrayers of Kamigawa | 76 | Common | €0.59 |
| Okiba-Gang ShinobiPlanechase Anthology · 35 | Planechase Anthology | 35 | Common | €0.46 |
| Okiba-Gang ShinobiPlanechase 2012 · 35 | Planechase 2012 | 35 | Common | €0.50 |
| Okiba-Gang ShinobiThe List Tokens · PCA-35 | The List Tokens | PCA-35 | Common | $1.05 |
| Okiba-Gang ShinobiSalvat 2005 · E53 | Salvat 2005 | E53 | Common | €0.87 |
| Okiba-Gang ShinobiSalvat 2005 · E54 | Salvat 2005 | E54 | Common | €1.13 |
| Okiba-Gang ShinobiJumpstart: Historic Horizons · 370 | Jumpstart: Historic Horizons | 370 | Common | — |
| Okiba Reckoner Raid // Nezumi Road CaptainKamigawa: Neon Dynasty · 117 | Kamigawa: Neon Dynasty | 117 | Common | €0.15 |
| Okina NightwatchSaviors of Kamigawa · 140 | Saviors of Kamigawa | 140 | Common | €0.05 |
| Okina NightwatchMagic Online Promos · 36290 | Magic Online Promos | 36290 | Common | — |
| Oko's AccomplicesThrone of Eldraine · 310 | Throne of Eldraine | 310 | Common | €0.02 |
| Old GhastbarkShadowmoor · 232 | Shadowmoor | 232 | Common | €0.06 |
| Old GhastbarkThe List Tokens · SHM-232 | The List Tokens | SHM-232 | Common | €0.08 |
| Old GuardUnsanctioned · 11 | Unsanctioned | 11 | Common | €0.11 |
| Old GuardUnstable · 16 | Unstable | 16 | Common | €0.10 |
| Old ThrushThe Hobbit · 2 | The Hobbit | 2 | Common | €0.05 |
| OliphauntThe Lord of the Rings: Tales of Middle-earth · 139 | The Lord of the Rings: Tales of Middle-earth | 139 | Common | €0.20 |
| OliphauntThe Lord of the Rings: Tales of Middle-earth · 426 | The Lord of the Rings: Tales of Middle-earth | 426 | Common | €0.16 |
| OliphauntThe Lord of the Rings: Tales of Middle-earth · 590 | The Lord of the Rings: Tales of Middle-earth | 590 | Common | $1.45 |
| OliphauntThe Hobbit Eternal · 199 | The Hobbit Eternal | 199 | Common | $0.27 |
| Olivia's DragoonEldritch Moon · 100 | Eldritch Moon | 100 | Common | €0.07 |
| Olivia's DragoonInnistrad Remastered · 127 | Innistrad Remastered | 127 | Common | €0.08 |
| Olivia's DragoonUltimate Masters · 109 | Ultimate Masters | 109 | Common | €0.04 |
| Olivia's DragoonShadows over Innistrad Remastered · 128 | Shadows over Innistrad Remastered | 128 | Common | — |
| Olivia's Midnight AmbushInnistrad: Double Feature · 118 | Innistrad: Double Feature | 118 | Common | €0.13 |
| Olivia's Midnight AmbushInnistrad: Midnight Hunt · 118 | Innistrad: Midnight Hunt | 118 | Common | €0.06 |
| Olog-hai CrusherThe Lord of the Rings: Tales of Middle-earth · 140 | The Lord of the Rings: Tales of Middle-earth | 140 | Common | €0.05 |
| Olog-hai CrusherThe Lord of the Rings: Tales of Middle-earth · 591 | The Lord of the Rings: Tales of Middle-earth | 591 | Common | €0.20 |
| Olog-hai CrusherThe Hobbit Eternal · 200 | The Hobbit Eternal | 200 | Common | $0.43 |
| Oltec ArchaeologistsThe Lost Caverns of Ixalan · 27 | The Lost Caverns of Ixalan | 27 | Common | €0.03 |