| Kite Shield | M12-210 |
| Kitsune Blademaster | CHK-25 |
| Kitt Kanto, Mayhem Diva | NCC-4 |
| Klauth, Unrivaled Ancient | AFC-50 |
| Klothys, God of Destiny | THB-220 |
| Knight Exemplar | M11-20 |
| Knight Exemplar | DDG-14 |
| Knight of Cliffhaven | DDP-5 |
| Knight of Dawn | TMP-26 |
| Knight of Meadowgrain | DDG-5 |
| Knight of Old Benalia | MH1-17 |
| Knight of Sorrows | RNA-14 |
| Knight of the Holy Nimbus | TSP-26 |
| Knight of the Skyward Eye | A25-19 |
| Knight of the Tusk | M19-18 |
| Knight-Captain of Eos | ALA-17 |
| Knightly Valor | RTR-13 |
| Knollspine Dragon | SHM-98 |
| Knowledge Pool (2 variants) | MBS-111 |
| Kobolds of Kher Keep | TMKC-12 |
| Kodama's Reach | MOC-306 |
| Kolaghan Stormsinger | DTK-145 |
| Kolaghan Warmonger | MAT-67 |
| Kolaghan's Command | DTK-224 |
| Kolvori, God of Kinship // The Ringhart Crest | KHM-181 |
| Komainu Battle Armor | NEC-21 |
| Kor Bladewhirl | BFZ-34 |
| Kor Cartographer | DDI-13 |
| Kor Celebrant | ZNR-22 |
| Kor Chant | CNS-73 |
| Kor Firewalker | A25-21 |
| Kor Hookmaster | EMA-18 |
| Kor Sky Climber | OGW-24 |
| Kor Skyfisher | DDO-16 |
| Kor Spiritdancer | ROE-31 |
| Korlash, Heir to Blackblade | FUT-87 |
| Korvold, Fae-Cursed King | ELD-329 |
| Kozilek, Butcher of Truth | UMA-6 |
| Kozilek's Predator | MM2-147 |
| Krark, the Thumbless | CMR-189 |
| Krark's Thumb | MRD-190 |
| Kraul Foragers | GRN-135 |
| Kraul Harpooner | GRN-136 |
| Kraul Warrior | BBD-204 |
| Krenko, Mob Boss | DDT-52 |
| Krenko, Tin Street Kingpin | WAR-137 |
| Krenko's Command | DDT-53 |
| Krenko's Command | J25-140 |
| Krenko's Enforcer | M15-152 |
| Krosan Druid | DOM-167 |