| Kenrith, the Returned KingMultiverse Legends · 69 | Multiverse Legends | 69 | Mythic Rare | €8.12 |
| Kenrith, the Returned KingMultiverse Legends · 134 | Multiverse Legends | 134 | Mythic Rare | €37.45 |
| Kenrith, the Returned KingMultiverse Legends · 134z | Multiverse Legends | 134z | Mythic Rare | €602.38 |
| Kenrith, the Returned KingThe List Tokens · ELD-303 | The List Tokens | ELD-303 | Mythic Rare | €1.25 |
| Keranos, God of StormsJourney into Nyx · 151 | Journey into Nyx | 151 | Mythic Rare | €5.37 |
| Keranos, God of StormsSecret Lair Drop Tokens · 79 | Secret Lair Drop Tokens | 79 | Mythic Rare | €17.12 |
| Keranos, God of StormsPioneer Masters · 311 | Pioneer Masters | 311 | Mythic Rare | — |
| Kess, Dissident MageCommander 2017 · 39 | Commander 2017 | 39 | Mythic Rare | €3.29 |
| Kess, Dissident MageModern Horizons · 206 | Modern Horizons | 206 | Mythic Rare | €2.90 |
| Kess, Dissident MageNew Capenna Commander · 344 | New Capenna Commander | 344 | Mythic Rare | €1.15 |
| Kess, Dissident MageSecret Lair Drop Tokens · 1167 | Secret Lair Drop Tokens | 1167 | Mythic Rare | €6.79 |
| Kess, Dissident MageTreasure Chest · 65763 | Treasure Chest | 65763 | Mythic Rare | — |
| Kess, Dissident MageThe List Tokens · NCC-344 | The List Tokens | NCC-344 | Mythic Rare | — |
| Kessig Wolf RunFrom the Vault: Twenty · 20 | From the Vault: Twenty | 20 | Mythic Rare | €1.11 |
| Kestia, the CultivatorCommander 2018 · 42 | Commander 2018 | 42 | Mythic Rare | €0.79 |
| Kestia, the CultivatorTreasure Chest · 70699 | Treasure Chest | 70699 | Mythic Rare | — |
| Kethis, the Hidden HandCore Set 2020 · 211 | Core Set 2020 | 211 | Mythic Rare | €3.14 |
| Kethis, the Hidden HandCore Set 2020 Promos · 211p | Core Set 2020 Promos | 211p | Mythic Rare | €5.64 |
| Kethis, the Hidden HandCore Set 2020 Promos · 211s | Core Set 2020 Promos | 211s | Mythic Rare | €7.30 |
| Kethis, the Hidden HandThe List Tokens · M20-211 | The List Tokens | M20-211 | Mythic Rare | — |
| Ketramose, the New DawnAetherdrift · 209 | Aetherdrift | 209 | Mythic Rare | $3.39 |
| Ketramose, the New DawnAetherdrift · 350 | Aetherdrift | 350 | Mythic Rare | $3.97 |
| Ketramose, the New DawnAetherdrift · 482 | Aetherdrift | 482 | Mythic Rare | €20.24 |
| Ketramose, the New DawnAetherdrift · 549 | Aetherdrift | 549 | Mythic Rare | $44.58 |
| Ketramose, the New DawnAetherdrift Promos · 209p | Aetherdrift Promos | 209p | Mythic Rare | $2.73 |
| Ketramose, the New DawnAetherdrift Promos · 209s | Aetherdrift Promos | 209s | Mythic Rare | €6.37 |
| Khalni HydraRise of the Eldrazi · 192 | Rise of the Eldrazi | 192 | Mythic Rare | €7.66 |
| Khalni HydraThe List Tokens · ROE-192 | The List Tokens | ROE-192 | Mythic Rare | €11.01 |
| Kharis & The Beholder2018 Heroes of the Realm · 1 | 2018 Heroes of the Realm | 1 | Mythic Rare | — |
| Kianne, Corrupted MemoryDuskmourn: House of Horror Commander · 2 | Duskmourn: House of Horror Commander | 2 | Mythic Rare | €0.35 |
| Kibo, Uktabi PrinceJumpstart 2022 · 40 | Jumpstart 2022 | 40 | Mythic Rare | €5.76 |
| Kibo, Uktabi PrinceJumpstart 2022 · 835 | Jumpstart 2022 | 835 | Mythic Rare | €0.86 |
| Kibo, Uktabi PrinceSecret Lair Drop Tokens · 2401 | Secret Lair Drop Tokens | 2401 | Mythic Rare | $6.18 |
| Kiki-Jiki, Mirror BreakerIconic Masters · 136 | Iconic Masters | 136 | Mythic Rare | €7.45 |
| Kiki-Jiki, Mirror BreakerJumpstart 2022 · 79 | Jumpstart 2022 | 79 | Mythic Rare | €11.21 |
| Kiki-Jiki, Mirror BreakerModern Masters 2015 · 121 | Modern Masters 2015 | 121 | Mythic Rare | €8.13 |
| Kiki-Jiki, Mirror BreakerModern Masters · 120 | Modern Masters | 120 | Mythic Rare | €8.10 |
| Kiki-Jiki, Mirror BreakerSecret Lair Drop Tokens · 1659 | Secret Lair Drop Tokens | 1659 | Mythic Rare | €8.88 |
| Kiki-Jiki, Mirror BreakerThe List Tokens · MM2-121 | The List Tokens | MM2-121 | Mythic Rare | €7.53 |
| Kiki-Jiki, Mirror BreakerFrom the Vault: Legends · 4 | From the Vault: Legends | 4 | Mythic Rare | €8.06 |
| Killer CosplayUnfinity · 145 | Unfinity | 145 | Mythic Rare | $0.19 |
| Killer CosplayUnfinity · 431 | Unfinity | 431 | Mythic Rare | $0.42 |
| Killian, Decisive MentorSecrets of Strixhaven Commander · 4 | Secrets of Strixhaven Commander | 4 | Mythic Rare | $0.44 |
| Kilo, Apogee MindEdge of Eternities Commander · 3 | Edge of Eternities Commander | 3 | Mythic Rare | €0.50 |
| Kindred ChargeSpecial Guests · 58 | Special Guests | 58 | Mythic Rare | €5.58 |
| Kindred DiscoveryWilds of Eldraine: Enchanting Tales · 22 | Wilds of Eldraine: Enchanting Tales | 22 | Mythic Rare | $12.13 |
| Kindred DiscoveryWilds of Eldraine: Enchanting Tales · 69 | Wilds of Eldraine: Enchanting Tales | 69 | Mythic Rare | $16.09 |
| Kindred DiscoveryWilds of Eldraine: Enchanting Tales · 89 | Wilds of Eldraine: Enchanting Tales | 89 | Mythic Rare | €74.11 |
| King T'Challa // Black Panther, Hope EnduringMarvel Super Heroes · 219 | Marvel Super Heroes | 219 | Mythic Rare | $6.74 |
| King T'Challa // Black Panther, Hope EnduringMarvel Super Heroes · 346 | Marvel Super Heroes | 346 | Mythic Rare | $17.37 |