| 18 | Keensight Mentor | Yongjae Choi | White | U | Ikoria: Lair of Behemoths |
| 56 | Keep Safe | Ekaterina Burmak | Blue | C | Ikoria: Lair of Behemoths |
| 10 | Keep Watch | Fred Rahmqvist | Blue | C | Planechase |
| 43 | Keep Watch | Fred Rahmqvist | Blue | C | Judgment |
| 98 | Keep Watch | Fred Rahmqvist | Blue | C | Wilds of Eldraine Commander |
| 71 | Keeper of Fables | Alex Konstad | Green | U | Zendikar Rising Commander |
| 163 | Keeper of Fables | Alex Konstad | Green | U | Throne of Eldraine |
| 407 | Keeper of Fables | Alex Konstad | Green | U | Jumpstart |
| 34 | Keeper of Keys | Bastien L. Deharme | Blue | R | Conspiracy: Take the Crown |
| Keeper of Kookus | Scott Hampton | Red | C | Visions |
| 135 | Keeper of Progenitus | Kev Walker | Green | R | Shards of Alara |
| 78 | Keeper of Secrets | Miguel Sacristan | Red | R | Warhammer 40,000 Commander |
| 27 | Keeper of the Accord | Denman Rooke | White | R | Commander Legends |
| 70 | Keeper of the Accord | Denman Rooke | White | R | Murders at Karlov Manor Commander |
| 164 | Keeper of the Accord | Leanna Crossan | White | R | Magic The Gathering—Fallout |
| 191 | Keeper of the Accord | Denman Rooke | White | R | March of the Machine Commander |
| 451 | Keeper of the Accord | Leanna Crossan | White | R | Magic The Gathering—Fallout |
| 621 | Keeper of the Accord | Denman Rooke | White | R | Commander Legends |
| 112 | Keeper of the Beasts | rk post | Green | U | Exodus |
| 54 | Keeper of the Cadence | Alix Branwyn | Blue | U | The Brothers' War |
| 577 | Keeper of the Crown (adventurer)(playtest) | Elliot Stevens | | R | Mystery Booster 2: Convention Edition |
| 65 | Keeper of the Dead | Brom | Black | U | Exodus |
| 85 | Keeper of the Flame | Terese Nielsen | Red | U | Exodus |
| 240 | Keeper of the Lens | Ryan Barger | | C | Dragons of Tarkir |
| 8 | Keeper of the Light | D. Alexander Gregory | White | U | Exodus |
| 36 | Keeper of the Mind | Matthew Wilson | Blue | U | Exodus |
| 42 | Keeper of the Nine Gales | Jim Nelson | Blue | R | Legions |
| 101 | Keeper of the Sacred Word | Dany Orizio | Green | C | Unhinged |
| Keeper of Tresserhorn | Z. Plucinski & D.A. Gregory | Black | R | Alliances |
| Keepers of the Faith | Daniel Gelon | White | C | Chronicles |
| Keepers of the Faith | Daniel Gelon | White | C | Legends |
| 93 | Keepsake Gorgon | Aaron Miller | Black | U | Theros |
| 141 | Keepsake Gorgon | Aaron Miller | Black | U | Conspiracy: Take the Crown |
| 15 | Kefnet the Mindful | Jose Cabrera | Blue | S | Masterpiece Series: Amonkhet Invocations |
| 59 | Kefnet the Mindful | Chase Stone | Blue | M | Amonkhet |
| 66 | Kefnet the Mindful | Chase Stone | Blue | M | Amonkhet Remastered |
| 118 | Kefnet the Mindful | Chase Stone | Blue | M | Duskmourn: House of Horror Commander |
| 39 | Kefnet's Last Word | Clint Cearley | Blue | R | Hour of Devastation |
| 231 | Kefnet's Monument | Titus Lunter | | U | Amonkhet |
| 275 | Kefnet's Monument | Titus Lunter | | U | Amonkhet Remastered |
| Kei Takahashi | Scott Kirschner | White/Green | U | Chronicles |
| Kei Takahashi | Scott Kirschner | White/Green | R | Legends |
| 155 | Kei Takahashi | Scott Kirschner | White/Green | U | Masters Edition III |
| 48 | Keiga, the Tide Star | Ittoku | Blue | M | Modern Masters |
| 63 | Keiga, the Tide Star | Svetlin Velinov | Blue | R | Iconic Masters |
| 72 | Keiga, the Tide Star | Ittoku | Blue | R | Champions of Kamigawa |
| 725 | Keiga, the Tide Star | Svetlin Velinov | Blue | R | Commander Legends: Battle for Baldur's Gate |
| 92 | Keldon Arsonist | Paolo Parente | Red | U | Prophecy |
| 139 | Keldon Battlewagon | Kev Walker | | R | Prophecy |
| 93 | Keldon Berserker | Paolo Parente | Red | C | Prophecy |
| 14 | Keldon Champion | Mark Tedin | Red | U | Premium Deck Series: Fire and Lightning |
| 58 | Keldon Champion | Mark Tedin | Red | U | Planechase |
| 90 | Keldon Champion | Mark Tedin | Red | U | Urza's Destiny |
| 135 | Keldon Champion | Mark Tedin | Red | U | Eternal Masters |
| 94 | Keldon Firebombers | Randy Gallegos | Red | R | Prophecy |
| 135 | Keldon Flamesage | Jason A. Engle | Red | R | Dominaria United |
| 407 | Keldon Flamesage | Jason A. Engle | Red | R | Dominaria United |
| 135 | Keldon Halberdier | Parente | Red | C | Iconic Masters |
| 167 | Keldon Halberdier | Parente | Red | C | Time Spiral |
| 173 | Keldon Halberdier | Parente | Red | C | Time Spiral Remastered |
| 65 | Keldon Mantle | Rebecca Guay | Red | C | Planeshift |
| 7 | Keldon Marauders | Alex Horley-Orlandelli | Red | C | Premium Deck Series: Fire and Lightning |
| 102 | Keldon Marauders | Alex Horley-Orlandelli | Red | C | Planar Chaos |
| 136 | Keldon Marauders | Alex Horley-Orlandelli | Red | C | Eternal Masters |
| 58 | Keldon Megaliths | Philip Straub | | U | Duel Decks Anthology, Jace vs. Chandra |
| 58 | Keldon Megaliths | Philip Straub | | U | Duel Decks: Jace vs. Chandra |
| 170 | Keldon Megaliths | Philip Straub | | U | Future Sight |
| 300 | Keldon Necropolis | Franz Vohwinkel | | R | Vintage Masters |
| 325 | Keldon Necropolis | Franz Vohwinkel | | R | Invasion |
| 134 | Keldon Overseer | Jason A. Engle | Red | C | Dominaria |
| 135 | Keldon Raider | Chris Seaman | Red | C | Dominaria |
| 146 | Keldon Raider | Chris Seaman | Red | C | Core Set 2020 |
| 563 | Keldon Raider | Chris Seaman | Red | C | Jumpstart 2022 |
| 136 | Keldon Strike Team | Josu Hernaiz | Red | C | Dominaria United |
| 112 | Keldon Twilight | Franz Vohwinkel | Black/Red | R | Planeshift |
| 91 | Keldon Vandals | Greg Staples | Red | C | Urza's Destiny |
| 136 | Keldon Warcaller | Aaron Miller | Red | C | Dominaria |
| Keldon Warlord | Kev Brockschmidt | Red | U | Fifth Edition |
| Keldon Warlord | Kev Brockschmidt | Red | U | Fourth Edition |
| Keldon Warlord | Kev Brockschmidt | Red | U | Revised Edition |
| Keldon Warlord | Kev Brockschmidt | Red | U | Unlimited Edition |
| Keldon Warlord | Kev Brockschmidt | Red | U | Limited Edition Beta |
| Keldon Warlord | Kev Brockschmidt | Red | U | Limited Edition Alpha |
| 101 | Keldon Warlord | Kev Brockschmidt | Red | U | Masters Edition |
| 28 | Keleth, Sunmane Familiar | Jesper Ejsing | White | U | Commander Legends |
| 33 | Keleth, Sunmane Familiar | Jesper Ejsing | White | U | Commander Masters |
| 550 | Keleth, Sunmane Familiar | Jesper Ejsing | White | U | Commander Legends |
| 101 | Kelinore Bat | Dave Kendall | Black | C | Magic 2010 |
| 212 | Kellan Joins Up | Wylie Beckert | White/Blue/Green | R | Outlaws of Thunder Junction |
| 354 | Kellan Joins Up | Wylie Beckert | White/Blue/Green | R | Outlaws of Thunder Junction |
| 231 | Kellan, Daring Traveler | Marta Nael | White | R | The Lost Caverns of Ixalan |
| 341 | Kellan, Daring Traveler | Jorge Gutierrez Garcia | White | R | The Lost Caverns of Ixalan |
| 212 | Kellan, Inquisitive Prodigy | Joshua Raphael | Blue/Green | R | Murders at Karlov Manor |
| 334 | Kellan, Inquisitive Prodigy | David Robert Hovey | Blue/Green | R | Murders at Karlov Manor |
| 91 | Kellan, Planar Trailblazer | Zoltan Boros | Red | R | Magic: The Gathering Foundations |
| 330 | Kellan, Planar Trailblazer | Aaron J. Riley | Red | R | Magic: The Gathering Foundations |
| 392 | Kellan, Planar Trailblazer | Aaron J. Riley | Red | R | Magic: The Gathering Foundations |
| 466 | Kellan, Planar Trailblazer | Zoltan Boros | Red | R | Magic: The Gathering Foundations |
| 230 | Kellan, the Fae-Blooded | Anna Steinbauer | Red | M | Wilds of Eldraine |
| 291 | Kellan, the Fae-Blooded | Omar Rayyan | Red | M | Wilds of Eldraine |
| 298 | Kellan, the Fae-Blooded | Andreas Zafiratos | Red | M | Wilds of Eldraine |
| 213 | Kellan, the Kid | Magali Villeneuve | White/Blue/Green | M | Outlaws of Thunder Junction |
| 294 | Kellan, the Kid | Benjamin Ee | White/Blue/Green | M | Outlaws of Thunder Junction |
| 18 | Kellan's Lightblades | Fajareka Setiawan | White | C | Wilds of Eldraine |
| 106 | Kellogg, Dangerous Mind | Josh Hass | Black/Red | R | Magic The Gathering—Fallout |
| 415 | Kellogg, Dangerous Mind | Josh Hass | Black/Red | R | Magic The Gathering—Fallout |
| 45 | Kelpie Guide | Ilse Gort | Blue | U | Strixhaven: School of Mages |
| 15 | Kels, Fight Fixer | Magali Villeneuve | Black | R | Jumpstart |
| 11 | Kelsien, the Plague | Chris Rallis | White/Black/Red | M | Ikoria Commander |
| Kelsinko Ranger | Mark Poole | White | C | Ice Age |
| 19 | Kemba, Kha Enduring | Zoltan Boros | White | R | Phyrexia: All Will Be One |
| 330 | Kemba, Kha Enduring | 泉 朝樹/TOMOKI IZUMI | White | R | Phyrexia: All Will Be One |
| 12 | Kemba, Kha Regent | Todd Lockwood | White | R | Scars of Mirrodin |
| 19 | Kemba, Kha Regent | Todd Lockwood | White | R | Double Masters |
| 34 | Kemba, Kha Regent | Ernanda Souza | White | U | Commander Masters |
| 63 | Kemba, Kha Regent | Todd Lockwood | White | R | Commander 2017 |
| 75 | Kemba, Kha Regent | Todd Lockwood | White | R | Commander 2014 |
| 671 | Kemba, Kha Regent | Peter Diamond | White | U | Commander Masters |
| 7 | Kemba's Banner | Wisnu Tan | White | R | Phyrexia: All Will Be One Commander |
| 45 | Kemba's Banner | Wisnu Tan | White | R | Phyrexia: All Will Be One Commander |
| 9 | Kemba's Legion | Anthony Francisco | White | U | Mirrodin Besieged |
| 13 | Kemba's Skyguard | Whit Brachna | White | C | Scars of Mirrodin |
| 13 | Kemba's Skyguard | Whit Brachna | White | C | Duel Decks: Elspeth vs. Tezzeret |
| 76 | Kemuri-Onna | Ittoku | Black | U | Saviors of Kamigawa |
| 13 | Kenessos, Priest of Thassa | Joshua Raphael | Blue | R | Jumpstart 2022 |
| 80 | Kenku Artificer | Dave Greco | Blue | C | Commander Legends: Battle for Baldur's Gate |
| 125 | Kenku Artificer | Dave Greco | Blue | U | Alchemy Horizons: Baldur's Gate |
| 4 | Kenrith, the Returned King | Aaron Miller | White | M | March of the Machine Multiverse Legends |
| 13 | Kenrith, the Returned King | Kieran Yanner | White | M | Mystery Booster 2: Convention Edition |
| 303 | Kenrith, the Returned King | Kieran Yanner | White | M | Throne of Eldraine |
| 515 | Kenrith, the Returned King | Greg and Tim Hildebrandt | White | M | The Lord of the Rings: Tales of Middle Earth Commander |
| 128 | Kenrith's Transformation | Kimonas Theodossiou | Green | U | Wilds of Eldraine Commander |
| 162 | Kenrith's Transformation | Kimonas Theodossiou | Green | U | Adventures in the Forgotten Realms Commander |
| 164 | Kenrith's Transformation | Kimonas Theodossiou | Green | U | Throne of Eldraine |
| 13 | Kentaro, the Smiling Cat | Donato Giancola | White | R | Betrayers of Kamigawa |
| 2 | Kenzo the Hardhearted | Mark Zug | White | U | Champions of Kamigawa |
| 334 | Keral Keep Disciples | Leesha Hannigan | Red | U | Core Set 2021 |
| 79 | Keranos, God of Storms | Jason A. Engle | Blue/Red | M | Secret Lair Drop |
| 151 | Keranos, God of Storms | Daarken | Blue/Red | M | Journey into Nyx |
| 48 | Keruga, the Macrosage | Denis Medri | Blue/Green | R | March of the Machine Multiverse Legends |
| 84 | Keruga, the Macrosage | Dan Murayama Scott | Blue/Green | R | Mystery Booster 2: Convention Edition |
| 225 | Keruga, the Macrosage | Dan Scott | Blue/Green | R | Ikoria: Lair of Behemoths |
| 131 | Keskit, the Flesh Sculptor | Yongjae Choi | Black | U | Commander Legends |
| 254 | Keskit, the Flesh Sculptor | Yongjae Choi | Black | U | March of the Machine Commander |
| 565 | Keskit, the Flesh Sculptor | Yongjae Choi | Black | U | Commander Legends |
| 39 | Kess, Dissident Mage | Izzy | Blue/Black/Red | M | Commander 2017 |
| 206 | Kess, Dissident Mage | Izzy | Blue/Black/Red | M | Modern Horizons |
| 344 | Kess, Dissident Mage | Izzy | Blue/Black/Red | M | Streets of New Capenna Commander |
| 122 | Kessig Cagebreakers | Wayne England | Green | R | Commander Anthology |
| 142 | Kessig Cagebreakers | Wayne England | Green | R | Innistrad: Midnight Hunt Commander |
| 187 | Kessig Cagebreakers | Wayne England | Green | R | Commander 2015 |
| 189 | Kessig Cagebreakers | Wayne England | Green | R | Innistrad |
| 681 | Kessig Cagebreakers | Wayne England | Green | R | Jumpstart 2022 |
| 214 | Kessig Dire Swine | Jason Kang | Green | C | Shadows over Innistrad |
| 164 | Kessig Flamebreather | Lius Lasahido | Red | C | Innistrad: Crimson Vow |
| 169 | Kessig Forgemaster | Winona Nelson | Red | U | Shadows over Innistrad |
| 142 | Kessig Malcontents | John Stanko | Red | U | Avacyn Restored |
| 231 | Kessig Naturalist | Johan Grenier | Red/Green | U | Innistrad: Midnight Hunt |
| 163 | Kessig Prowler | Slawomir Maniak | Green | U | Eldritch Moon |
| 121 | Kessig Recluse | Vincent Proce | Green | C | Dark Ascension |
| 151 | Kessig Wolf | Wayne England | Red | C | Innistrad |
| 20 | Kessig Wolf Run | Eytan Zana | | M | From the Vault: Twenty |
| 243 | Kessig Wolf Run | Eytan Zana | | R | Innistrad |
| 269 | Kessig Wolf Run | Eytan Zana | | R | Murders at Karlov Manor Commander |
| 284 | Kessig Wolf Run | Eytan Zana | | R | Ikoria Commander |
| 340 | Kessig Wolf Run | Eytan Zana | | R | The Lost Caverns of Ixalan Commander |
| 352 | Kessig Wolf Run | Eytan Zana | | R | Modern Horizons 3 Commander |
| 410 | Kessig Wolf Run | Eytan Zana | | R | March of the Machine Commander |
| 411 | Kessig Wolf Run | Eytan Zana | | R | Streets of New Capenna Commander |
| 898 | Kessig Wolf Run | Eytan Zana | | R | Commander Legends: Battle for Baldur's Gate |
| 165 | Kessig Wolfrider | Bram Sels | Red | R | Innistrad: Crimson Vow |
| 379 | Kessig Wolfrider | Bram Sels | Red | R | Innistrad: Crimson Vow |
| 42 | Kestia, the Cultivator | Zezhou Chen | White/Blue/Green | M | Commander 2018 |
| 206 | Kethek, Crucible Goliath | Zoltan Boros | Black/Red | R | Phyrexia: All Will Be One |
| 319 | Kethek, Crucible Goliath | Flavio Girón | Black/Red | R | Phyrexia: All Will Be One |
| 211 | Kethis, the Hidden Hand | Yongjae Choi | White/Black/Green | M | Core Set 2020 |
| 236 | Ketria Crystal | Yeong-Hao Han | | U | Ikoria: Lair of Behemoths |
| 250 | Ketria Triome | Sam Burley | | R | Ikoria: Lair of Behemoths |
| 59 | Key to the Archive | Andreas Zafiratos | | R | Innistrad: Midnight Hunt Alchemy |
| 27 | Key to the City | Sean Murray | | R | The Brothers' War Retro Artifacts |
| 90 | Key to the City | Sean Murray | | R | The Brothers' War Retro Artifacts |
| 216 | Key to the City | Sean Murray | | R | Commander 2019 |
| 220 | Key to the City | Sean Murray | | R | Kaladesh |
| 248 | Key to the City | Sean Murray | | R | Kaladesh Remastered |
| 248 | Key to the City | Sean Murray | | R | Commander 2021 |
| 39 | Keymaster Rogue | Winona Nelson | Blue | C | Gatecrash |
| 47 | Keymaster Rogue | Winona Nelson | Blue | C | Ravnica Remastered |
| 251 | Keys to the House | Artur Treffner | | U | Duskmourn: House of Horror |
| Kezzerdrix | Matthew Wilson | Black | R | Tempest |
| 107 | Kezzerdrix | Matthew D. Wilson | Black | R | Tempest Remastered |
| 124 | Kezzerdrix | Matthew D. Wilson | Black | U | Vintage Masters |
| Khabál Ghoul | Douglas Shuler | Black | U | Arabian Nights |
| 75 | Khabál Ghoul | Douglas Shuler | Black | R | Masters Edition |
| 192 | Khalni Ambush | Grzegorz Rutkowski | Green | U | Zendikar Rising |
| 28 | Khalni Garden | Ryan Pancoast | | C | Duel Decks: Nissa vs. Ob Nixilis |
| 122 | Khalni Garden | Ryan Pancoast | | C | Planechase Anthology |
| 122 | Khalni Garden | Ryan Pancoast | | C | Planechase 2012 Edition |
| 127 | Khalni Garden | Ryan Pancoast | | C | Archenemy |
| 138 | Khalni Garden | Ryan Pancoast | | C | Worldwake |
| 170 | Khalni Garden | Ryan Pancoast | | C | Jumpstart: Historic Horizons |
| 262 | Khalni Garden | Ryan Pancoast | | C | Commander 2018 |
| 302 | Khalni Garden | Ryan Pancoast | | C | Commander 2013 Edition |