| 4+ | Kemba's Skyguard | MTGDDElspeth_013 |
| 1 | Kemba's Skyguard Foil | MTGScarsofMirrodin_013F |
| 4+ | Kemuri-Onna | MTGSaviors_076 |
| 2 | Kemuri-Onna FOIL | MTGSaviors_076F |
| 4+ | Kentaro, the Smiling Cat | MTGBetrayers_013 |
| 4+ | Keral Keep Disciples (Introductory Product) | MTGCore Set 2021_334 |
| 4+ | Keranos, God of Storms | MTGJourneyNyx_151 |
| 1 | Keruga, the Macrosage (FOIL) | MTGIkoria_225F |
| 4+ | Keskit, the Flesh Sculptor | MTGCMR_131 |
| 1 | Keskit, the Flesh Sculptor (Foil) | MTGCMR_131F |
| 1 | Kess, Dissident Mage (FOIL) | MTGCommander2017_039F |
| 4+ | Kessig Cagebreakers | MTGInnistrad_189 |
| 1 | Kessig Cagebreakers | MTGCommander2015_187 |
| 4+ | Kessig Cagebreakers | MTGMIC_142 |
| 1 | Kessig Prowler // Sinuous Predator | MTGEldritch Moon_163 |
| 4+ | Kessig Recluse | MTGDarkAscension_121 |
| 1 | Kessig Recluse FOIL | MTGDarkAscension_121F |
| 4+ | Kessig Wolf | MTGInnistrad_151 |
| 1 | Kessig Wolf FOIL | MTGInnistrad_151F |
| 4+ | Kessig Wolf Run | MTGMKC_269 |
| 3 | Kessig Wolf Run | MTGInnistrad_243 |
| 1 | Kessig Wolf Run | MTGCommander2020_284 |
| 1 | Kestia, the Cultivator (FOIL) | MTGCommander2018_042 |
| 1 | Kethis, the Hidden Hand (FOIL) | MTGCore Set 2020_211F |
| 4+ | Ketria Crystal | MTGIkoria_236 |
| 3 | Key to the City | MTGKaladesh_220 |
| 3 | Key to the City | MTGCommander2019_216 |
| 2 | Key to the City | MTGC21_248 |
| 1 | Key to the City (FOIL) | MTGKaladesh_220F |
| 4+ | Keymaster Rogue | MTGGatecrash_039 |
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