| Oglor, Devoted AssistantAlchemy: Innistrad · 20 | Alchemy: Innistrad | 20 | Mythic Rare | — |
| Oildeep GearhulkAetherdrift · 215 | Aetherdrift | 215 | Mythic Rare | $1.07 |
| Oildeep GearhulkAetherdrift · 351 | Aetherdrift | 351 | Mythic Rare | €2.22 |
| Oildeep GearhulkAetherdrift · 487 | Aetherdrift | 487 | Mythic Rare | €3.03 |
| Oildeep GearhulkAetherdrift · 550 | Aetherdrift | 550 | Mythic Rare | €9.07 |
| Oildeep GearhulkAetherdrift Promos · 215p | Aetherdrift Promos | 215p | Mythic Rare | €0.96 |
| Oildeep GearhulkAetherdrift Promos · 215s | Aetherdrift Promos | 215s | Mythic Rare | €1.44 |
| Ojer Axonil, Deepest Might // Temple of PowerThe Lost Caverns of Ixalan · 158 | The Lost Caverns of Ixalan | 158 | Mythic Rare | €22.84 |
| Ojer Axonil, Deepest Might // Temple of PowerThe Lost Caverns of Ixalan · 317 | The Lost Caverns of Ixalan | 317 | Mythic Rare | $22.09 |
| Ojer Kaslem, Deepest Growth // Temple of CultivationThe Lost Caverns of Ixalan · 204 | The Lost Caverns of Ixalan | 204 | Mythic Rare | €6.10 |
| Ojer Kaslem, Deepest Growth // Temple of CultivationThe Lost Caverns of Ixalan · 318 | The Lost Caverns of Ixalan | 318 | Mythic Rare | €5.56 |
| Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical TimeThe Lost Caverns of Ixalan · 67 | The Lost Caverns of Ixalan | 67 | Mythic Rare | €2.94 |
| Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical TimeThe Lost Caverns of Ixalan · 315 | The Lost Caverns of Ixalan | 315 | Mythic Rare | €3.13 |
| Ojer Taq, Deepest Foundation // Temple of CivilizationThe Lost Caverns of Ixalan · 26 | The Lost Caverns of Ixalan | 26 | Mythic Rare | €20.84 |
| Ojer Taq, Deepest Foundation // Temple of CivilizationThe Lost Caverns of Ixalan · 314 | The Lost Caverns of Ixalan | 314 | Mythic Rare | €21.04 |
| Ojutai ExemplarsDragons of Tarkir · 27 | Dragons of Tarkir | 27 | Mythic Rare | $0.47 |
| Ojutai ExemplarsFoundations Jumpstart · 232 | Foundations Jumpstart | 232 | Mythic Rare | €0.30 |
| O-Kagachi, Vengeful KamiCommander 2017 · 45 | Commander 2017 | 45 | Mythic Rare | €0.90 |
| O-Kagachi, Vengeful KamiDominaria United Commander · 164 | Dominaria United Commander | 164 | Mythic Rare | €0.43 |
| O-Kagachi, Vengeful KamiMystery Booster 2 Tokens · 138 | Mystery Booster 2 Tokens | 138 | Mythic Rare | $0.40 |
| O-Kagachi, Vengeful KamiTreasure Chest · 65733 | Treasure Chest | 65733 | Mythic Rare | — |
| Oketra the TrueAmonkhet · 21 | Amonkhet | 21 | Mythic Rare | $3.04 |
| Oketra the TrueAmonkhet Promos · 21s | Amonkhet Promos | 21s | Mythic Rare | €4.95 |
| Oketra the TrueAmonkhet Remastered · 27 | Amonkhet Remastered | 27 | Mythic Rare | — |
| Oko, Lorwyn Liege // Oko, Shadowmoor ScionLorwyn Eclipsed · 61 | Lorwyn Eclipsed | 61 | Mythic Rare | $0.81 |
| Oko, Lorwyn Liege // Oko, Shadowmoor ScionLorwyn Eclipsed · 287 | Lorwyn Eclipsed | 287 | Mythic Rare | €1.41 |
| Oko, the RingleaderOutlaws of Thunder Junction · 223 | Outlaws of Thunder Junction | 223 | Mythic Rare | $0.46 |
| Oko, the RingleaderOutlaws of Thunder Junction · 296 | Outlaws of Thunder Junction | 296 | Mythic Rare | €1.16 |
| Oko, the RingleaderOutlaws of Thunder Junction · 305 | Outlaws of Thunder Junction | 305 | Mythic Rare | $2.56 |
| Oko, the RingleaderOutlaws of Thunder Junction Promos · 223p | Outlaws of Thunder Junction Promos | 223p | Mythic Rare | €0.36 |
| Oko, the RingleaderOutlaws of Thunder Junction Promos · 223s | Outlaws of Thunder Junction Promos | 223s | Mythic Rare | €0.49 |
| Oko, the TricksterThrone of Eldraine · 309 | Throne of Eldraine | 309 | Mythic Rare | $0.57 |
| Oko, the TricksterThe List Tokens · ELD-309 | The List Tokens | ELD-309 | Mythic Rare | €0.57 |
| Oko, Thief of CrownsThrone of Eldraine · 197 | Throne of Eldraine | 197 | Mythic Rare | $5.63 |
| Oko, Thief of CrownsThrone of Eldraine · 271 | Throne of Eldraine | 271 | Mythic Rare | €10.23 |
| Oko, Thief of CrownsBreaking News · 50 | Breaking News | 50 | Mythic Rare | €4.50 |
| Oko, Thief of CrownsBreaking News · 77 | Breaking News | 77 | Mythic Rare | €41.29 |
| Oko, Thief of CrownsThrone of Eldraine Promos · 197p | Throne of Eldraine Promos | 197p | Mythic Rare | €8.48 |
| Oko, Thief of CrownsThrone of Eldraine Promos · 197s | Throne of Eldraine Promos | 197s | Mythic Rare | €13.15 |
| Oko, Thief of CrownsMagic Online Promos · 78858 | Magic Online Promos | 78858 | Mythic Rare | — |
| Ol' BuzzbarkThe List (Unfinity Foil Edition) · 51 | The List (Unfinity Foil Edition) | 51 | Mythic Rare | $0.36 |
| Ol' BuzzbarkUnstable · 134 | Unstable | 134 | Mythic Rare | $0.40 |
| Old GnawboneAdventures in the Forgotten Realms · 197 | Adventures in the Forgotten Realms | 197 | Mythic Rare | €44.24 |
| Old GnawboneAdventures in the Forgotten Realms · 296 | Adventures in the Forgotten Realms | 296 | Mythic Rare | €55.69 |
| Old GnawboneAdventures in the Forgotten Realms Promos · 197a | Adventures in the Forgotten Realms Promos | 197a | Mythic Rare | €75.82 |
| Old GnawboneAdventures in the Forgotten Realms Promos · 197p | Adventures in the Forgotten Realms Promos | 197p | Mythic Rare | €43.22 |
| Old GnawboneAdventures in the Forgotten Realms Promos · 197s | Adventures in the Forgotten Realms Promos | 197s | Mythic Rare | $57.65 |
| Old GnawboneSecret Lair Drop Tokens · 1016 | Secret Lair Drop Tokens | 1016 | Mythic Rare | €88.52 |
| Old GnawboneThe List Tokens · AFR-197 | The List Tokens | AFR-197 | Mythic Rare | €40.00 |
| Old GnawboneMagic Online Promos · 92758 | Magic Online Promos | 92758 | Mythic Rare | — |