| Kaervek, the PunisherOutlaws of Thunder Junction · 92 | Outlaws of Thunder Junction | 92 | Rare | €0.31 |
| Kaervek, the PunisherOutlaws of Thunder Junction · 289 | Outlaws of Thunder Junction | 289 | Rare | €0.35 |
| Kaervek, the PunisherOutlaws of Thunder Junction Promos · 92p | Outlaws of Thunder Junction Promos | 92p | Rare | €0.35 |
| Kaervek, the PunisherOutlaws of Thunder Junction Promos · 92s | Outlaws of Thunder Junction Promos | 92s | Rare | $0.73 |
| Kaervek, the SpitefulCore Set 2021 · 106 | Core Set 2021 | 106 | Rare | €0.21 |
| Kaervek, the SpitefulCore Set 2021 · 358 | Core Set 2021 | 358 | Rare | €0.61 |
| Kaervek, the SpitefulCore Set 2021 Promos · 106p | Core Set 2021 Promos | 106p | Rare | €0.17 |
| Kaervek, the SpitefulCore Set 2021 Promos · 106s | Core Set 2021 Promos | 106s | Rare | €0.69 |
| Kaervek, the SpitefulMagic Online Promos · 82014 | Magic Online Promos | 82014 | Rare | — |
| Kagemaro, First to SufferSaviors of Kamigawa · 73 | Saviors of Kamigawa | 73 | Rare | €0.99 |
| Kaheera, the OrphanguardIkoria: Lair of Behemoths · 224 | Ikoria: Lair of Behemoths | 224 | Rare | $0.65 |
| Kaheera, the OrphanguardIkoria: Lair of Behemoths · 353 | Ikoria: Lair of Behemoths | 353 | Rare | €2.08 |
| Kaheera, the OrphanguardMultiverse Legends · 47 | Multiverse Legends | 47 | Rare | €0.60 |
| Kaheera, the OrphanguardMultiverse Legends · 112 | Multiverse Legends | 112 | Rare | €1.62 |
| Kaheera, the OrphanguardMultiverse Legends · 177 | Multiverse Legends | 177 | Rare | €13.32 |
| Kaheera, the OrphanguardMultiverse Legends · 177z | Multiverse Legends | 177z | Rare | $330.60 |
| Kaheera, the OrphanguardIkoria: Lair of Behemoths Promos · 224p | Ikoria: Lair of Behemoths Promos | 224p | Rare | €0.80 |
| Kaheera, the OrphanguardIkoria: Lair of Behemoths Promos · 224s | Ikoria: Lair of Behemoths Promos | 224s | Rare | €1.79 |
| Kaheera, the OrphanguardMagic Online Promos · 80861 | Magic Online Promos | 80861 | Rare | — |
| Kaho, Minamo HistorianSaviors of Kamigawa · 41 | Saviors of Kamigawa | 41 | Rare | €0.67 |
| Kain, Traitorous DragoonFinal Fantasy · 105 | Final Fantasy | 105 | Rare | €0.18 |
| Kain, Traitorous DragoonFinal Fantasy · 316 | Final Fantasy | 316 | Rare | €2.23 |
| Kain, Traitorous DragoonFinal Fantasy · 449 | Final Fantasy | 449 | Rare | $1.32 |
| Kain, Traitorous DragoonFinal Fantasy Promos · 105s | Final Fantasy Promos | 105s | Rare | €3.18 |
| Kaito, Dancing ShadowPhyrexia: All Will Be One · 204 | Phyrexia: All Will Be One | 204 | Rare | €0.27 |
| Kaito, Dancing ShadowPhyrexia: All Will Be One · 340 | Phyrexia: All Will Be One | 340 | Rare | €0.41 |
| Kaito, Dancing ShadowPhyrexia: All Will Be One · 463 | Phyrexia: All Will Be One | 463 | Rare | $2.45 |
| Kaito, Dancing ShadowPhyrexia: All Will Be One Promos · 204p | Phyrexia: All Will Be One Promos | 204p | Rare | €0.33 |
| Kaito, Dancing ShadowPhyrexia: All Will Be One Promos · 204s | Phyrexia: All Will Be One Promos | 204s | Rare | $1.15 |
| Kalastria HighbornDCI Promos · 39 | DCI Promos | 39 | Rare | €18.41 |
| Kalastria HighbornFoundations · 607 | Foundations | 607 | Rare | $0.26 |
| Kalastria HighbornFoundations · 753 | Foundations | 753 | Rare | €0.25 |
| Kalastria HighbornThe List Tokens · WWK-59 | The List Tokens | WWK-59 | Rare | €3.99 |
| Kalastria HighbornWorldwake · 59 | Worldwake | 59 | Rare | $0.74 |
| Kalastria HighbornMagic Online Promos · 43552 | Magic Online Promos | 43552 | Rare | — |
| Kalemne, Disciple of IroasLegendary Cube Prize Pack · 107 | Legendary Cube Prize Pack | 107 | Rare | — |
| Kalemne's CaptainCommander 2015 · 5 | Commander 2015 | 5 | Rare | €0.15 |
| Kalemne's CaptainCommander 2020 · 92 | Commander 2020 | 92 | Rare | €0.02 |
| Kalemne's CaptainCommander Anthology Volume II · 31 | Commander Anthology Volume II | 31 | Rare | $0.16 |
| Kalemne's CaptainLegendary Cube Prize Pack · 7 | Legendary Cube Prize Pack | 7 | Rare | — |
| Kallist RhokaUnknown Event · RZ02a | Unknown Event | RZ02a | Rare | $29.99 |
| Kalonian BehemothMagic 2010 · 188 | Magic 2010 | 188 | Rare | $0.30 |
| Kalonian BehemothSalvat 2011 · 146 | Salvat 2011 | 146 | Rare | €0.54 |
| Kalonian TwingroveMagic 2015 · 182 | Magic 2015 | 182 | Rare | €0.46 |
| Kamachal, Ship's MascotAlchemy: Ixalan · 15 | Alchemy: Ixalan | 15 | Rare | — |
| Kamahl, Fist of KrosaArchenemy · 61 | Archenemy | 61 | Rare | $0.53 |
| Kamahl, Fist of KrosaOnslaught · 268 | Onslaught | 268 | Rare | €1.65 |
| Kamahl, Pit FighterTenth Edition · 214 | Tenth Edition | 214 | Rare | €0.20 |
| Kamahl, Pit FighterTenth Edition · 214★ | Tenth Edition | 214★ | Rare | €0.17 |
| Kamahl, Pit FighterDuel Decks: Mind vs. Might · 39 | Duel Decks: Mind vs. Might | 39 | Rare | €0.15 |