| Kavu Climber | A25-175 |
| Kavu Predator | PLC-132 |
| Kavu Primarch | MM2-146 |
| Kaya, Ghost Assassin | CN2-75 |
| Kaya, Orzhov Usurper | RNA-186 |
| Kaya's Ghostform | WAR-94 |
| Kazandu Blademaster | ZEN-16 |
| Kazandu Refuge | C18-261 |
| Kederekt Parasite | CON-48 |
| Keen Sense | PLC-152 |
| Keeper of Fables | ELD-163 |
| Keeper of the Accord | CMR-27 |
| Keeper of the Dead | EXO-65 |
| Keeper of the Nine Gales | LGN-42 |
| Keldon Champion | UDS-90 |
| Keldon Halberdier | IMA-135 |
| Keldon Overseer | DOM-134 |
| Keldon Strike Team | DMU-136 |
| Kelpie Guide | STX-45 |
| Kels, Fight Fixer | JMP-15 |
| Kemba's Legion | MBS-9 |
| Kenrith, the Returned King | ELD-303 |
| Kenrith's Transformation | AFC-162 |
| Ketria Triome | IKO-250 |
| Khalni Garden | DDR-28 |
| Khalni Heart Expedition | C18-154 |
| Khalni Hydra | ROE-192 |
| Khenra Scrapper | HOU-100 |
| Kher Keep | MKC-270 |
| Kher Keep | TSP-275 |
| Kiki-Jiki, Mirror Breaker | MM2-121 |
| Kiki-Jiki, Mirror Breaker | CHK-175 |
| Killer Whale | EXO-37 |
| Kiln Fiend | IMA-137 |
| Kilnmouth Dragon | DDG-59 |
| Kin-Tree Invocation | KTK-183 |
| Kin-Tree Warden | KTK-139 |
| Kindred Boon | C17-5 |
| Kindred Discovery | C17-11 |
| Kindred Dominance | C17-18 |
| King of the Pride | MH1-16 |
| Kingpin's Pet | GTC-173 |
| Kinnan, Bonder Prodigy | IKO-192 |
| Kinsbaile Cavalier | MOR-15 |
| Kiora, Behemoth Beckoner | WAR-232 |
| Kiora's Dambreaker | WAR-58 |
| Kiora's Follower | DDO-52 |
| Kird Ape | EMA-137 |
| Kirri, Talented Sprout | OTC-7 |
| Kiss of the Amesha | BBD-225 |