| Kaldra CompleatModern Horizons 2 · 227 | Modern Horizons 2 | 227 | Mythic Rare | €4.85 |
| Kaldra CompleatModern Horizons 2 · 379 | Modern Horizons 2 | 379 | Mythic Rare | €5.36 |
| Kaldra CompleatModern Horizons 2 Promos · 227s | Modern Horizons 2 Promos | 227s | Mythic Rare | €12.88 |
| Kaldra CompleatSpotlight Series · 2 | Spotlight Series | 2 | Mythic Rare | €72.05 |
| Kaldra CompleatThe List Tokens · MH2-227 | The List Tokens | MH2-227 | Mythic Rare | €6.40 |
| Kaldra CompleatArena Anthology 3 · 21 | Arena Anthology 3 | 21 | Mythic Rare | — |
| Kalemne, Disciple of IroasCommander 2015 · 45 | Commander 2015 | 45 | Mythic Rare | €3.62 |
| Kalemne, Disciple of IroasCommander Anthology Volume II · 7 | Commander Anthology Volume II | 7 | Mythic Rare | €9.21 |
| Kalemne, Disciple of IroasCommander 2015 Oversized · 45 | Commander 2015 Oversized | 45 | Mythic Rare | €0.25 |
| Kalitas, Bloodchief of GhetZendikar · 99 | Zendikar | 99 | Mythic Rare | €3.64 |
| Kalitas, Traitor of GhetOath of the Gatewatch · 86 | Oath of the Gatewatch | 86 | Mythic Rare | €3.45 |
| Kalitas, Traitor of GhetOath of the Gatewatch Promos · 86s | Oath of the Gatewatch Promos | 86s | Mythic Rare | €7.26 |
| Kalitas, Traitor of GhetThe List Tokens · OGW-86 | The List Tokens | OGW-86 | Mythic Rare | €4.31 |
| Kalitas, Traitor of GhetSecret Lair Drop Tokens · 1687 | Secret Lair Drop Tokens | 1687 | Mythic Rare | €9.03 |
| Kalitas, Traitor of GhetExplorer Anthology 1 · 5 | Explorer Anthology 1 | 5 | Mythic Rare | — |
| Kalitas, Traitor of GhetFoundations Commander · 108 | Foundations Commander | 108 | Mythic Rare | $0.84 |
| Kalonian HydraBloomburrow Commander · 226 | Bloomburrow Commander | 226 | Mythic Rare | €4.92 |
| Kalonian HydraCommander 2016 · 154 | Commander 2016 | 154 | Mythic Rare | €4.79 |
| Kalonian HydraCommander Anthology Volume II · 140 | Commander Anthology Volume II | 140 | Mythic Rare | €4.00 |
| Kalonian HydraMagic 2014 · 181 | Magic 2014 | 181 | Mythic Rare | €5.06 |
| Kalonian HydraMarch of the Machine Commander · 305 | March of the Machine Commander | 305 | Mythic Rare | €5.24 |
| Kalonian Hydra30th Anniversary Play Promos · 21 | 30th Anniversary Play Promos | 21 | Mythic Rare | €10.73 |
| Kalonian HydraThe List Tokens · M14-181 | The List Tokens | M14-181 | Mythic Rare | €5.48 |
| Kamahl, Fist of KrosaDominaria Remastered · 166 | Dominaria Remastered | 166 | Mythic Rare | $0.71 |
| Kamahl, Fist of KrosaDominaria Remastered · 344 | Dominaria Remastered | 344 | Mythic Rare | $0.64 |
| Kamahl, Heart of KrosaCommander Legends · 237 | Commander Legends | 237 | Mythic Rare | $3.37 |
| Kamahl, Heart of KrosaCommander Legends · 581 | Commander Legends | 581 | Mythic Rare | €3.88 |
| Kamahl, Heart of KrosaMagic Online Promos · 86338 | Magic Online Promos | 86338 | Mythic Rare | — |
| Kamahl, Heart of KrosaThe List Tokens · CMR-237 | The List Tokens | CMR-237 | Mythic Rare | — |
| Kamiz, Obscura OculusNew Capenna Commander · 3 | New Capenna Commander | 3 | Mythic Rare | €0.51 |
| Kamiz, Obscura OculusNew Capenna Commander · 103 | New Capenna Commander | 103 | Mythic Rare | €1.34 |
| Kamiz, Obscura OculusNew Capenna Commander · 188 | New Capenna Commander | 188 | Mythic Rare | €0.08 |
| Kang the ConquerorMarvel Super Heroes · 62 | Marvel Super Heroes | 62 | Mythic Rare | $0.43 |
| Kang the ConquerorMarvel Super Heroes · 403 | Marvel Super Heroes | 403 | Mythic Rare | €1.11 |
| Karador, Ghost ChieftainDouble Masters 2022 · 238 | Double Masters 2022 | 238 | Mythic Rare | $0.34 |
| Karador, Ghost ChieftainDouble Masters 2022 · 514 | Double Masters 2022 | 514 | Mythic Rare | €0.93 |
| Karador, Ghost ChieftainCommander 2011 · 207 | Commander 2011 | 207 | Mythic Rare | €0.62 |
| Karador, Ghost ChieftainCommander Legends · 521 | Commander Legends | 521 | Mythic Rare | $0.47 |
| Karador, Ghost ChieftainCommander 2011 Oversized · 207 | Commander 2011 Oversized | 207 | Mythic Rare | €0.36 |
| Karador, Ghost ChieftainThe List Tokens · CMD-207 | The List Tokens | CMD-207 | Mythic Rare | $0.46 |
| Karador, Ghost ChieftainSecret Lair Drop Tokens · 1646 | Secret Lair Drop Tokens | 1646 | Mythic Rare | €1.56 |
| Karador, Ghost ChieftainSecret Lair Drop Tokens · 1646★ | Secret Lair Drop Tokens | 1646★ | Mythic Rare | $3.38 |
| Karador, Ghost ChieftainMagic Online Promos · 51534 | Magic Online Promos | 51534 | Mythic Rare | — |
| Karador, Ghost ChieftainMagic Online Promos · 86188 | Magic Online Promos | 86188 | Mythic Rare | — |
| KarakasEternal Masters · 240 | Eternal Masters | 240 | Mythic Rare | €13.81 |
| KarakasTales of Middle-earth Commander · 367 | Tales of Middle-earth Commander | 367 | Mythic Rare | €14.44 |
| KarakasTales of Middle-earth Commander · 397 | Tales of Middle-earth Commander | 397 | Mythic Rare | €33.31 |
| KarakasTales of Middle-earth Commander · 397z | Tales of Middle-earth Commander | 397z | Mythic Rare | €2,270.94 |
| KarakasLegacy Championship · 2020A | Legacy Championship | 2020A | Mythic Rare | — |
| KarakasUltimate Box Topper · U36 | Ultimate Box Topper | U36 | Mythic Rare | €20.62 |