| 113 | Ogre Recluse | Jim Murray | Red | U | Betrayers of Kamigawa |
| 72 | Ogre Resister | Efrem Palacios | Red | C | Mirrodin Besieged |
| 9 | Ogre Savant | Parente | Red | C | Duel Decks: Izzet vs. Golgari |
| 55 | Ogre Savant | Parente | Red | C | Duel Decks: Ajani vs. Nicol Bolas |
| 70 | Ogre Savant | Paolo Parente | Red | C | Guildpact |
| 159 | Ogre Sentry | Eric Deschamps | Red | C | Rise of the Eldrazi |
| 168 | Ogre Sentry | Eric Deschamps | Red | C | Conspiracy: Take the Crown |
| 91 | Ogre Shaman | Paolo Parente | Red | R | Exodus |
| 148 | Ogre Shaman | Parente | Red | R | Tempest Remastered |
| 215 | Ogre Siegebreaker | Zoltan Boros | Black/Red | U | Core Set 2020 |
| 50 | Ogre Slumlord | Trevor Claxton | Black | R | Zendikar Rising Commander |
| 71 | Ogre Slumlord | ウナック/WOONAK | Black | R | Jumpstart 2022 |
| 74 | Ogre Slumlord | Trevor Claxton | Black | R | Gatecrash |
| 104 | Ogre Slumlord | Trevor Claxton | Black | R | Adventures in the Forgotten Realms Commander |
| 145 | Ogre Slumlord | Trevor Claxton | Black | R | Outlaws of Thunder Junction Commander |
| 177 | Ogre Slumlord | Trevor Claxton | Black | R | Commander Masters |
| 186 | Ogre Slumlord | Trevor Claxton | Black | R | Bloomburrow Commander |
| 260 | Ogre Slumlord | Trevor Claxton | Black | R | Jumpstart |
| 518 | Ogre Slumlord | Trevor Claxton | Black | R | Commander Masters |
| Ogre Taskmaster | Dan Frazier | Red | U | Portal Second Age |
| 128 | Ogre Taskmaster | Dan Frazier | Red | C | Masters Edition IV |
| 203 | Ogre Taskmaster | Jeff Easley | Red | U | Seventh Edition |
| 205 | Ogre Taskmaster | Dany Orizio | Red | U | Ninth Edition |
| 205 | Ogre Taskmaster | Dany Orizio | Red | U | Eighth Edition |
| 206 | Ogre Taskmaster | Orizio Daniele | Red | U | Mercadian Masques |
| 220 | Ogre's Cleaver | Adi Granov | | U | Rise of the Eldrazi |
| 33 | Ohran Frostfang | Torstein Nordstrand | Green | R | Commander 2019 |
| 180 | Ohran Frostfang | Torstein Nordstrand | Green | R | Murders at Karlov Manor Commander |
| 199 | Ohran Frostfang | Torstein Nordstrand | Green | R | Outlaws of Thunder Junction Commander |
| 309 | Ohran Frostfang | Torstein Nordstrand | Green | R | Commander Masters |
| 567 | Ohran Frostfang | Torstein Nordstrand | Green | R | Commander Masters |
| 650 | Ohran Frostfang | Ron Spears | Green | R | Commander Masters |
| 158 | Ojer Axonil, Deepest Might | Victor Adame Minguez | Red | M | The Lost Caverns of Ixalan |
| 317 | Ojer Axonil, Deepest Might | Clint Lockwood | Red | M | The Lost Caverns of Ixalan |
| 204 | Ojer Kaslem, Deepest Growth | Ryan Pancoast | Green | M | The Lost Caverns of Ixalan |
| 318 | Ojer Kaslem, Deepest Growth | Clint Lockwood | Green | M | The Lost Caverns of Ixalan |
| 67 | Ojer Pakpatiq, Deepest Epoch | Chris Rahn | Blue | M | The Lost Caverns of Ixalan |
| 315 | Ojer Pakpatiq, Deepest Epoch | Clint Lockwood | Blue | M | The Lost Caverns of Ixalan |
| 26 | Ojer Taq, Deepest Foundation | Cristi Balanescu | White | M | The Lost Caverns of Ixalan |
| 314 | Ojer Taq, Deepest Foundation | Clint Lockwood | White | M | The Lost Caverns of Ixalan |
| 246 | Oji, the Exquisite Blade | Andreas Zafiratos | White/Blue | U | Alchemy Horizons: Baldur's Gate |
| 284 | Oji, the Exquisite Blade | Pedro Potier | White/Blue | U | Alchemy Horizons: Baldur's Gate |
| 290 | Oji, the Exquisite Blade | Andreas Zafiratos | White/Blue | U | Commander Legends: Battle for Baldur's Gate |
| 436 | Oji, the Exquisite Blade | Pedro Potier | White/Blue | U | Commander Legends: Battle for Baldur's Gate |
| 27 | Ojutai Exemplars | Willian Murai | White | M | Dragons of Tarkir |
| 156 | Ojutai, Soul of Winter | Chase Stone | White/Blue | R | Fate Reforged |
| 187 | Ojutai, Soul of Winter | Chase Stone | White/Blue | R | Commander 2017 |
| 67 | Ojutai's Breath | Kev Walker | Blue | C | Dragons of Tarkir |
| 68 | Ojutai's Breath | Kev Walker | Blue | C | Iconic Masters |
| 22 | Ojutai's Command | Willian Murai | White/Blue | R | Historic Anthology 5 |
| 227 | Ojutai's Command | Willian Murai | White/Blue | R | Dragons of Tarkir |
| 68 | Ojutai's Summons | Jakub Kasper | Blue | C | Dragons of Tarkir |
| 90 | Ojutai's Summons | Jakub Kasper | Blue | C | Jumpstart: Historic Horizons |
| 227 | O-Kagachi Made Manifest | Kieran Yanner | | M | Kamigawa: Neon Dynasty |
| 362 | O-Kagachi Made Manifest | 霧糺/KIRITADA | | M | Kamigawa: Neon Dynasty |
| 489 | O-Kagachi Made Manifest | Kieran Yanner | | M | Kamigawa: Neon Dynasty |
| 6 | Okaun, Eye of Chaos | Yongjae Choi | Red | R | Battlebond |
| 22 | Oketra's Attendant | Lake Hurwitz | White | U | Amonkhet |
| 28 | Oketra's Attendant | Lake Hurwitz | White | U | Amonkhet Remastered |
| 17 | Oketra's Avenger | Anthony Palumbo | White | C | Hour of Devastation |
| 29 | Oketra's Avenger | Anthony Palumbo | White | C | Amonkhet Remastered |
| 18 | Oketra's Last Mercy | Howard Lyon | White | R | Hour of Devastation |
| 188 | Oketra's Monument | Christine Choi | | U | Dominaria United Commander |
| 233 | Oketra's Monument | Christine Choi | | U | Amonkhet |
| 277 | Oketra's Monument | Christine Choi | | U | Amonkhet Remastered |
| 118 | Okiba Salvage | Lie Setiawan | Black | U | Kamigawa: Neon Dynasty |
| 35 | Okiba-Gang Shinobi | Mark Zug | Black | C | Planechase Anthology |
| 35 | Okiba-Gang Shinobi | Mark Zug | Black | C | Planechase 2012 Edition |
| 76 | Okiba-Gang Shinobi | Mark Zug | Black | C | Betrayers of Kamigawa |
| 111 | Okiba-Gang Shinobi | Mark Zug | Black | C | Jumpstart: Historic Horizons |
| 280 | Okina, Temple to the Grandfathers | Keith Garletts | | R | Champions of Kamigawa |
| 309 | Oko, the Trickster | Chris Rallis | Blue/Green | M | Throne of Eldraine |
| 50 | Oko, Thief of Crowns | Michael Walsh | Blue/Green | M | Outlaws of Thunder Junction Breaking News |
| 77 | Oko, Thief of Crowns | Michael Walsh | Blue/Green | M | Outlaws of Thunder Junction Breaking News |
| 197 | Oko, Thief of Crowns | Yongjae Choi | Blue/Green | M | Throne of Eldraine |
| 310 | Oko's Accomplices | Zezhou Chen | Blue | C | Throne of Eldraine |
| 312 | Oko's Hospitality | Deruchenko Alexander | Blue/Green | R | Throne of Eldraine |
| 233 | Olag, Ludevic's Hubris | Ryan Pancoast | Blue/Black | R | Innistrad: Midnight Hunt |
| 320 | Olag, Ludevic's Hubris | Milivoj Ćeran | Blue/Black | R | Innistrad: Midnight Hunt |
| 232 | Old Ghastbark | Thomas M. Baxa | White/Green | C | Shadowmoor |
| Old Man of the Sea | Susan Van Camp | Blue | R | Arabian Nights |
| 45 | Old Man of the Sea | Susan Van Camp | Blue | R | Masters Edition III |
| 244 | Old Rutstein | Greg Staples | Black/Green | R | Innistrad: Crimson Vow |
| 326 | Old Rutstein | Mark Riddick | Black/Green | R | Innistrad: Crimson Vow |
| 227 | Old Stickfingers | Jehan Choo | Black/Green | R | Duskmourn: House of Horror Commander |
| 234 | Old Stickfingers | Jehan Choo | Black/Green | R | Innistrad: Midnight Hunt |
| 321 | Old Stickfingers | DZO | Black/Green | R | Innistrad: Midnight Hunt |
| 62 | Old-Fashioned Vampire | Simon Dominic | Black | U | Unstable |
| 199 | Old-Growth Dryads | Yongjae Choi | Green | R | Ixalan |
| 245 | Olivia, Crimson Bride | Anna Steinbauer | Black/Red | M | Innistrad: Crimson Vow |
| 315 | Olivia, Crimson Bride | Xiaobotong | Black/Red | M | Innistrad: Crimson Vow |
| 343 | Olivia, Crimson Bride | Bastien L. Deharme | Black/Red | M | Innistrad: Crimson Vow |
| 172 | Olivia's Attendants | Dmitry Burmak | Red | R | Innistrad: Crimson Vow |
| 307 | Olivia's Attendants | Christian Angel | Red | R | Innistrad: Crimson Vow |
| 127 | Olivia's Bloodsworn | Daarken | Black | U | Shadows Over Innistrad Remastered |
| 127 | Olivia's Bloodsworn | Daarken | Black | U | Shadows over Innistrad |
| 100 | Olivia's Dragoon | Chris Rallis | Black | C | Eldritch Moon |
| 109 | Olivia's Dragoon | Chris Rallis | Black | C | Ultimate Masters |
| 128 | Olivia's Dragoon | Chris Rallis | Black | C | Shadows Over Innistrad Remastered |
| 118 | Olivia's Midnight Ambush | Chris Rallis | Black | C | Innistrad: Midnight Hunt |
| 20 | Olivia's Wrath | Nestor Ossandon Leal | Black | R | Innistrad: Crimson Vow Commander |
| 58 | Olivia's Wrath | Nestor Ossandon Leal | Black | R | Innistrad: Crimson Vow Commander |
| 205 | Olivia's Wrath | Néstor Ossandón Leal | Black | R | The Lost Caverns of Ixalan Commander |
| 27 | Ollenbock Escort | Eric Wilkerson | White | U | Innistrad: Crimson Vow |
| 140 | Olog-hai Crusher | Andrea Piparo | Red | C | The Lord of the Rings: Tales of Middle Earth |
| 591 | Olog-hai Crusher | Andrea Piparo | Red | C | The Lord of the Rings: Tales of Middle Earth |
| 503 | Olórin's Searing Light | Matt Stewart | White/Red | R | The Lord of the Rings: Tales of Middle Earth Commander |
| 203 | Oloro, Ageless Ascetic | Eric Deschamps | White/Blue/Black | M | Commander 2013 Edition |
| 27 | Oltec Archaeologists | Winona Nelson | White | C | The Lost Caverns of Ixalan |
| 708 | Omarthis, Ghostfire Initiate | Brent Hollowell | | M | Commander Masters |
| 748 | Omarthis, Ghostfire Initiate | Brent Hollowell | | M | Commander Masters |
| 58 | Omen of the Sea | Piotr Dura | Blue | C | Theros Beyond Death |
| 30 | Omen of the Sun | Piotr Dura | White | C | Theros Beyond Death |
| 831 | Omen of the Sun | Piotr Dura | White | C | Commander Masters |
| 616 | Omenpath to Naya (playtest) | Sandy Lee | | R | Mystery Booster 2: Convention Edition |
| 39 | Omenspeaker | Dallas Williams | Blue | C | Duel Decks: Elspeth vs. Kiora |
| 57 | Omenspeaker | Dallas Williams | Blue | C | Theros |
| 64 | Omenspeaker | Dallas Williams | Blue | C | Core Set 2019 |
| 83 | Omenspeaker | Dallas Williams | Blue | C | Commander Legends |
| 118 | Omenspeaker | Dallas Williams | Blue | C | Conspiracy: Take the Crown |
| 125 | Omenspeaker | Dallas Williams | Blue | C | Battlebond |
| 189 | Ominous Cemetery | Anato Finnstark | | U | Doctor Who Commander |
| 241 | Ominous Parcel | Joe Slucher | | C | Streets of New Capenna |
| 65 | Ominous Roost | Josu Hernaiz | Blue | U | Innistrad: Midnight Hunt |
| 61 | Ominous Seas | Vincent Proce | Blue | U | Ikoria: Lair of Behemoths |
| 41 | Ominous Sphinx | Lars Grant-West | Blue | U | Hour of Devastation |
| 72 | Ominous Sphinx | Lars Grant-West | Blue | U | Amonkhet Remastered |
| 62 | Ominous Traveler | Igor Kieryluk | | R | Innistrad: Midnight Hunt Alchemy |
| 249 | Omnath, Locus of All | Bryan Sola | White/Blue/Black/Red/Green | R | March of the Machine |
| 313 | Omnath, Locus of All | Jessica Rossier | White/Blue/Black/Red/Green | R | March of the Machine |
| 387 | Omnath, Locus of All | Helge C. Balzer | White/Blue/Black/Red/Green | R | March of the Machine |
| 232 | Omnath, Locus of Creation | Chris Rahn | White/Blue/Red/Green | M | Zendikar Rising |
| 312 | Omnath, Locus of Creation | Bastien Grivet | White/Blue/Red/Green | M | Zendikar Rising |
| 2 | Omnath, Locus of Mana | Chase Stone | Green | M | Commander Collection: Green |
| 7 | Omnath, Locus of Mana | Mike Bierek | Green | M | From the Vault: Legends |
| 109 | Omnath, Locus of Mana | Mike Bierek | Green | M | Worldwake |
| 310 | Omnath, Locus of Mana | Mike Bierek | Green | M | Commander Masters |
| 568 | Omnath, Locus of Mana | Mike Bierek | Green | M | Commander Masters |
| 680 | Omnath, Locus of Mana | Alex Dos Diaz | Green | M | Commander Masters |
| 1063 | Omnath, Locus of Mana | Alex Dos Diaz | Green | M | Commander Masters |
| 97 | Omnath, Locus of Rage | Brad Rigney | Red/Green | M | Zendikar Rising Commander |
| 217 | Omnath, Locus of Rage | Brad Rigney | Red/Green | M | Battle for Zendikar |
| 236 | Omnath, Locus of Rage | Brad Rigney | Red/Green | M | Outlaws of Thunder Junction Commander |
| 216 | Omnath, Locus of the Roil | Lius Lasahido | Blue/Red/Green | M | Core Set 2020 |
| 116 | Omniclown Colossus | Ralph Horsley | Red | R | Unfinity (Acorn) |
| 504 | Omnipresent Impostor (playtest) | Francois Dery | | R | Mystery Booster 2: Convention Edition |
| 24 | Omniscience | Justin & Alexis Hernandez | Blue | M | Wilds of Eldraine Enchanting Tales |
| 34 | Omniscience | Josh Hass | Blue | S | Masterpiece Series: Amonkhet Invocations |
| 63 | Omniscience | Jason Chan | Blue | M | Magic 2013 |
| 65 | Omniscience | Jason Chan | Blue | M | Core Set 2019 |
| 70 | Omniscience | やこたこす/YAKOTAKOS | Blue | M | Wilds of Eldraine Enchanting Tales |
| 161 | Omniscience | Jason Chan | Blue | M | Magic: The Gathering Foundations |
| 312 | Omniscience | Dominik Mayer | Blue | M | Magic: The Gathering Foundations |
| 379 | Omniscience | Dominik Mayer | Blue | M | Magic: The Gathering Foundations |
| 49 | Omnispell Adept | Jason Rainville | Blue | R | Guilds of Ravnica |
| 192 | Omnivorous Flytrap | Antonio José Manzanedo | Green | R | Duskmourn: House of Horror |
| 322 | Omnivorous Flytrap | Chun Lo | Green | R | Duskmourn: House of Horror |
| 2 | Omo, Queen of Vesuva | Alex Brock | Blue/Green | M | Modern Horizons 3 Commander |
| 14 | Omo, Queen of Vesuva | Chun Lo | Blue/Green | M | Modern Horizons 3 Commander |
| 22 | Omo, Queen of Vesuva | Alex Brock | Blue/Green | M | Modern Horizons 3 Commander |
| 30 | Omo, Queen of Vesuva | Alex Brock | Blue/Green | M | Modern Horizons 3 Commander |
| 31 | On Alert | Lie Setiawan | White | C | Throne of Eldraine |
| 28 | On Serra's Wings | Johannes Voss | White | U | Dominaria |
| 380 | On Serra's Wings | Johannes Voss | White | U | Commander Legends |
| 30 | Ondu Inversion | James Paick | White | R | Zendikar Rising |
| 321 | Ondu Inversion | James Paick | White | R | Zendikar Rising |
| 196 | Ondu Knotmaster | Jarel Threat | White/Black | U | Modern Horizons 3 |
| 41 | Ondu Rising | Igor Kieryluk | White | U | Battle for Zendikar |
| 30 | Ondu Skyruins | James Paick | | R | Zendikar Rising |
| 321 | Ondu Skyruins | James Paick | | R | Zendikar Rising |
| 101 | Ondu Spiritdancer | Tran Nguyen | White | R | Duskmourn: House of Horror Commander |
| 723 | Ondu Spiritdancer | Tran Nguyen | White | R | Commander Masters |
| 756 | Ondu Spiritdancer | Tran Nguyen | White | R | Commander Masters |
| 126 | One Dozen Eyes | Darrell Riche | Green | U | Mirrodin |
| 159 | One Dozen Eyes | Darrell Riche | Green | U | Commander 2013 Edition |
| 22 | One Last Job | Caroline Gariba | White | R | Outlaws of Thunder Junction |
| 315 | One Last Job | Caroline Gariba | White | R | Outlaws of Thunder Junction |
| 41 | One Thousand Lashes | Daarken | White/Black | U | Guild Kit: Orzhov |
| 183 | One Thousand Lashes | Daarken | White/Black | U | Gatecrash |
| 45 | One with Death (playtest) | Robert Schuster | Black | C | Mystery Booster |
| 59 | One with the Multiverse | Liiga Smilshkalne | Blue | M | The Brothers' War |
| 121 | One with the Multiverse | Liiga Smilshkalne | Blue | M | Duskmourn: House of Horror Commander |
| 316 | One with the Multiverse | Liiga Smilshkalne | Blue | M | The Brothers' War |
| 59 | One with the Stars | Caio Monteiro | Blue | U | Theros Beyond Death |
| 230 | One-Eyed Scarecrow | Dave Kendall | | C | Innistrad |
| 77 | Ongoing Investigation | Bud Cook | Blue | U | Shadows over Innistrad |
| 84 | Ongoing Investigation | Bud Cook | Blue | U | Shadows Over Innistrad Remastered |
| 114 | Ongoing Investigation | Bud Cook | Blue | U | Murders at Karlov Manor Commander |
| 19 | Oni of Wild Places | Mark Tedin | Red | U | Duel Decks: Speed vs. Cunning |
| 85 | Oni of Wild Places | Mark Tedin | Red | U | Commander Anthology |
| 108 | Oni of Wild Places | Mark Tedin | Red | U | Saviors of Kamigawa |
| 130 | Oni of Wild Places | Mark Tedin | Red | U | Magic: The Gathering-Commander |
| 51 | Oni Possession | Aleksi Briclot | Black | U | Duel Decks Anthology, Divine vs. Demonic |
| 51 | Oni Possession | Aleksi Briclot | Black | U | Duel Decks: Divine vs. Demonic |
| 135 | Oni Possession | Aleksi Briclot | Black | U | Champions of Kamigawa |
| 92 | Onslaught | Paolo Parente | Red | C | Exodus |
| Onyx Talisman | Sandra Everingham | | U | Ice Age |
| 51 | Oona's Blackguard | Kev Walker | Black | U | Zendikar Rising Commander |
| 72 | Oona's Blackguard | Kev Walker | Black | U | Morningtide |
| 261 | Oona's Blackguard | Kev Walker | Black | U | Jumpstart |
| 173 | Oona's Gatewarden | Mike Dringenberg | Blue/Black | C | Shadowmoor |
| 27 | Oona's Grace | Rebecca Guay | Blue | C | Eventide |
| 63 | Oona's Grace | Rebecca Guay | Blue | C | Eternal Masters |
| 91 | Oona's Grace | Rebecca Guay | Blue | C | Commander 2019 |
| 85 | Oona's Prowler | Wayne Reynolds | Black | R | Double Masters 2022 |
| 133 | Oona's Prowler | Wayne Reynolds | Black | R | Lorwyn |
| 443 | Oona's Prowler | Wayne Reynolds | Black | R | Double Masters 2022 |
| 16 | Opal Lake Gatekeepers | Seb McKinnon | Blue | C | Dragon's Maze |
| 13 | Opalescence | John Avon | White | R | Urza's Destiny |
| 17 | Opal-Eye, Konda's Yojimbo | Greg Staples | White | R | Betrayers of Kamigawa |
| 141 | Opaline Bracers | Anthony S. Waters | | C | Fifth Dawn |