| Knight of the ReliquaryDuel Decks: Knights vs. Dragons · 1 | Duel Decks: Knights vs. Dragons | 1 | Mythic Rare | €1.17 |
| Knuckles the EchidnaSecret Lair Drop Tokens · 2082 | Secret Lair Drop Tokens | 2082 | Mythic Rare | €16.23 |
| Kodama of the West TreeFoundations Jumpstart · 78 | Foundations Jumpstart | 78 | Mythic Rare | €16.27 |
| Kodama of the West TreeKamigawa: Neon Dynasty · 199 | Kamigawa: Neon Dynasty | 199 | Mythic Rare | €14.81 |
| Kodama of the West TreeKamigawa: Neon Dynasty · 392 | Kamigawa: Neon Dynasty | 392 | Mythic Rare | €22.09 |
| Kodama of the West TreeKamigawa: Neon Dynasty · 423 | Kamigawa: Neon Dynasty | 423 | Mythic Rare | €19.16 |
| Kodama of the West TreeKamigawa: Neon Dynasty · 477 | Kamigawa: Neon Dynasty | 477 | Mythic Rare | €18.03 |
| Kodama of the West TreeKamigawa: Neon Dynasty Promos · 199p | Kamigawa: Neon Dynasty Promos | 199p | Mythic Rare | €15.00 |
| Kodama of the West TreeKamigawa: Neon Dynasty Promos · 199s | Kamigawa: Neon Dynasty Promos | 199s | Mythic Rare | €18.47 |
| Kodama of the West TreeMagic Online Promos · 98061 | Magic Online Promos | 98061 | Mythic Rare | — |
| Koh, the Face StealerAvatar: The Last Airbender Promos · 107s | Avatar: The Last Airbender Promos | 107s | Mythic Rare | €6.93 |
| Koh, the Face StealerAvatar: The Last Airbender · 107 | Avatar: The Last Airbender | 107 | Mythic Rare | $0.40 |
| Koh, the Face StealerAvatar: The Last Airbender · 322 | Avatar: The Last Airbender | 322 | Mythic Rare | €3.33 |
| Kokusho, the Evening StarModern Masters · 89 | Modern Masters | 89 | Mythic Rare | €18.48 |
| Koma, Cosmos SerpentKaldheim · 221 | Kaldheim | 221 | Mythic Rare | €4.62 |
| Koma, Cosmos SerpentKaldheim · 326 | Kaldheim | 326 | Mythic Rare | $6.65 |
| Koma, Cosmos SerpentMurders at Karlov Manor Commander · 213 | Murders at Karlov Manor Commander | 213 | Mythic Rare | €3.69 |
| Koma, Cosmos SerpentKaldheim Promos · 221p | Kaldheim Promos | 221p | Mythic Rare | €4.13 |
| Koma, Cosmos SerpentKaldheim Promos · 221s | Kaldheim Promos | 221s | Mythic Rare | €7.94 |
| Koma, Cosmos SerpentAvatar: The Last Airbender Eternal · 51 | Avatar: The Last Airbender Eternal | 51 | Mythic Rare | €3.92 |
| Koma, Cosmos SerpentSecret Lair Drop Tokens · 1765 | Secret Lair Drop Tokens | 1765 | Mythic Rare | €13.68 |
| Koma, Cosmos SerpentMagic Online Promos · 88356 | Magic Online Promos | 88356 | Mythic Rare | — |
| Kor HavenZendikar Expeditions · 41 | Zendikar Expeditions | 41 | Mythic Rare | €19.61 |
| Kor HavenTales of Middle-earth Commander · 368 | Tales of Middle-earth Commander | 368 | Mythic Rare | $18.66 |
| Kor HavenTales of Middle-earth Commander · 398 | Tales of Middle-earth Commander | 398 | Mythic Rare | $44.59 |
| Kor HavenTales of Middle-earth Commander · 398z | Tales of Middle-earth Commander | 398z | Mythic Rare | €2,014.47 |
| Korvold, Fae-Cursed KingEdge of Eternities Commander · 120 | Edge of Eternities Commander | 120 | Mythic Rare | $0.57 |
| Korvold, Fae-Cursed KingThrone of Eldraine · 329 | Throne of Eldraine | 329 | Mythic Rare | $3.79 |
| Korvold, Fae-Cursed KingYear of the Dragon 2024 Tokens · 6 | Year of the Dragon 2024 Tokens | 6 | Mythic Rare | €35.16 |
| Korvold, Fae-Cursed KingSecret Lair Drop Tokens · 1625 | Secret Lair Drop Tokens | 1625 | Mythic Rare | €17.11 |
| Korvold, Fae-Cursed KingThe List Tokens · ELD-329 | The List Tokens | ELD-329 | Mythic Rare | $3.94 |
| Korvold, Fae-Cursed KingThe List Tokens · EOC-120 | The List Tokens | EOC-120 | Mythic Rare | — |
| Korvold, Fae-Cursed KingSecret Lair Drop Tokens · 2761 | Secret Lair Drop Tokens | 2761 | Mythic Rare | $13.31 |
| Korvold, Gleeful GluttonWilds of Eldraine Commander · 26 | Wilds of Eldraine Commander | 26 | Mythic Rare | $0.60 |
| Korvold, Gleeful GluttonWilds of Eldraine Commander · 38 | Wilds of Eldraine Commander | 38 | Mythic Rare | $1.12 |
| Koth of the HammerDuel Decks: Venser vs. Koth · 44 | Duel Decks: Venser vs. Koth | 44 | Mythic Rare | €0.88 |
| Koth of the HammerScars of Mirrodin · 94 | Scars of Mirrodin | 94 | Mythic Rare | €1.48 |
| Koth of the HammerSecret Lair Drop Tokens · 1248 | Secret Lair Drop Tokens | 1248 | Mythic Rare | €3.18 |
| Kotis, Sibsig ChampionTarkir: Dragonstorm Commander · 5 | Tarkir: Dragonstorm Commander | 5 | Mythic Rare | $0.39 |
| Kotori, Pilot ProdigyNeon Dynasty Commander · 2 | Neon Dynasty Commander | 2 | Mythic Rare | €0.35 |
| Kotori, Pilot ProdigyNeon Dynasty Commander · 75 | Neon Dynasty Commander | 75 | Mythic Rare | €0.93 |
| Kotori, Pilot ProdigyNeon Dynasty Commander · 78 | Neon Dynasty Commander | 78 | Mythic Rare | €0.03 |
| Kotori, Pilot ProdigyMagic Online Promos · 98091 | Magic Online Promos | 98091 | Mythic Rare | — |
| Kozilek, Butcher of TruthDouble Masters 2022 · 2 | Double Masters 2022 | 2 | Mythic Rare | €35.47 |
| Kozilek, Butcher of TruthDouble Masters 2022 · 336 | Double Masters 2022 | 336 | Mythic Rare | €46.67 |
| Kozilek, Butcher of TruthDouble Masters 2022 · 414 | Double Masters 2022 | 414 | Mythic Rare | €49.86 |
| Kozilek, Butcher of TruthDouble Masters 2022 · 576 | Double Masters 2022 | 576 | Mythic Rare | €31.68 |
| Kozilek, Butcher of TruthModern Masters 2015 · 5 | Modern Masters 2015 | 5 | Mythic Rare | €34.84 |
| Kozilek, Butcher of TruthThe List Tokens · UMA-6 | The List Tokens | UMA-6 | Mythic Rare | €37.45 |
| Kozilek, Butcher of TruthUltimate Box Topper · U3 | Ultimate Box Topper | U3 | Mythic Rare | €54.94 |