| Lagonna-Band Trailblazer | JOU-14 |
| Labyrinth Guardian | AKH-60 |
| Laboratory Maniac | UMA-61 |
| Laboratory Maniac | ISD-61 |
| Laboratory Brute | EMN-67 |
| Kytheon, Hero of Akros // Gideon, Battle-Forged | ORI-23 |
| Kyren Negotiations | MMQ-198 |
| Kynaios and Tiro of Meletis | C16-36 |
| Kwain, Itinerant Meddler | CMR-284 |
| Kulrath Knight | SHM-190 |
| Kuldotha Rebirth | SOM-96 |
| Krydle of Baldur's Gate | AFR-343 |
| Kruphix, God of Horizons | JOU-152 |
| Krumar Bond-Kin | KTK-77 |
| Krovikan Sorcerer | VMA-77 |
| Krosan Vorine | LGN-131 |
| Krosan Verge | ZNC-134 |
| Krosan Verge | C18-263 |
| Krosan Tusker | ONS-272 |
| Krosan Tusker | DDU-14 |
| Krosan Druid | DOM-167 |
| Krenko's Enforcer | M15-152 |
| Krenko's Command | DDT-53 |
| Krenko's Command | J25-140 |
| Krenko, Tin Street Kingpin | WAR-137 |
| Krenko, Mob Boss | DDT-52 |
| Kraul Warrior | BBD-204 |
| Kraul Harpooner | GRN-136 |
| Kraul Foragers | GRN-135 |
| Krark's Thumb | MRD-190 |
| Krark, the Thumbless | CMR-189 |
| Kozilek's Predator | MM2-147 |
| Kozilek, Butcher of Truth | UMA-6 |
| Korvold, Fae-Cursed King | ELD-329 |
| Korlash, Heir to Blackblade | FUT-87 |
| Kor Spiritdancer | ROE-31 |
| Kor Skyfisher | DDO-16 |
| Kor Sky Climber | OGW-24 |
| Kor Hookmaster | EMA-18 |
| Kor Firewalker | A25-21 |
| Kor Chant | CNS-73 |
| Kor Celebrant | ZNR-22 |
| Kor Cartographer | DDI-13 |
| Kor Bladewhirl | BFZ-34 |
| Komainu Battle Armor | NEC-21 |
| Kolvori, God of Kinship // The Ringhart Crest | KHM-181 |
| Kolaghan's Command | DTK-224 |
| Kolaghan Warmonger | MAT-67 |
| Kolaghan Stormsinger | DTK-145 |
| Kodama's Reach | MOC-306 |