| Kulrath KnightLorwyn Eclipsed Commander · 126 | Lorwyn Eclipsed Commander | 126 | Uncommon | €0.17 |
| Kulrath KnightShadowmoor · 190 | Shadowmoor | 190 | Uncommon | €0.61 |
| Kulrath KnightThe List Tokens · SHM-190 | The List Tokens | SHM-190 | Uncommon | €0.59 |
| Kulrath MysticLorwyn Eclipsed · 56 | Lorwyn Eclipsed | 56 | Common | $0.04 |
| Kulrath ZealotLorwyn Eclipsed · 148 | Lorwyn Eclipsed | 148 | Common | €0.05 |
| Kumano Faces Kakkazan // Etching of KumanoKamigawa: Neon Dynasty · 152 | Kamigawa: Neon Dynasty | 152 | Uncommon | €0.20 |
| Kumano, Master YamabushiChampions of Kamigawa · 176 | Champions of Kamigawa | 176 | Rare | €0.23 |
| Kumano's BlessingBetrayers of Kamigawa · 111 | Betrayers of Kamigawa | 111 | Common | $0.06 |
| Kumano's PupilsChampions of Kamigawa · 177 | Champions of Kamigawa | 177 | Uncommon | $0.09 |
| Kumena's AwakeningRivals of Ixalan Promos · 42s | Rivals of Ixalan Promos | 42s | Rare | $0.73 |
| Kumena's AwakeningRivals of Ixalan · 42 | Rivals of Ixalan | 42 | Rare | €0.28 |
| Kumena's SpeakerIxalan · 196 | Ixalan | 196 | Uncommon | €0.13 |
| Kumena, Tyrant of OrazcaThe Lost Caverns of Ixalan Commander · 274 | The Lost Caverns of Ixalan Commander | 274 | Mythic Rare | $0.37 |
| Kumena, Tyrant of OrazcaRivals of Ixalan Promos · 162s | Rivals of Ixalan Promos | 162s | Mythic Rare | €8.25 |
| Kumena, Tyrant of OrazcaRivals of Ixalan · 162 | Rivals of Ixalan | 162 | Mythic Rare | $0.50 |
| Kumena, Tyrant of OrazcaSecret Lair Drop Tokens · 1412 | Secret Lair Drop Tokens | 1412 | Mythic Rare | €14.00 |
| Kumena, Tyrant of OrazcaSecret Lair Drop Tokens · 1412★ | Secret Lair Drop Tokens | 1412★ | Mythic Rare | $28.17 |
| K'un-Lun WarriorMarvel Super Heroes · 140 | Marvel Super Heroes | 140 | Common | €0.06 |
| Kunoros, Hound of AthreosTheros Beyond Death Promos · 222p | Theros Beyond Death Promos | 222p | Rare | $0.45 |
| Kunoros, Hound of AthreosTheros Beyond Death Promos · 222s | Theros Beyond Death Promos | 222s | Rare | €1.00 |
| Kunoros, Hound of AthreosTheros Beyond Death · 222 | Theros Beyond Death | 222 | Rare | $0.40 |
| Kunoros, Hound of AthreosTheros Beyond Death · 341 | Theros Beyond Death | 341 | Rare | €0.76 |
| Kunoros, Hound of AthreosMagic Online Promos · 79889 | Magic Online Promos | 79889 | Rare | — |
| Kuon, Ogre Ascendant // Kuon's EssenceSaviors of Kamigawa · 78 | Saviors of Kamigawa | 78 | Rare | €0.48 |
| Kura, the Boundless SkyKamigawa: Neon Dynasty · 200 | Kamigawa: Neon Dynasty | 200 | Mythic Rare | €2.23 |
| Kura, the Boundless SkyKamigawa: Neon Dynasty · 411 | Kamigawa: Neon Dynasty | 411 | Mythic Rare | €4.40 |
| Kura, the Boundless SkyKamigawa: Neon Dynasty · 478 | Kamigawa: Neon Dynasty | 478 | Mythic Rare | $3.61 |
| Kura, the Boundless SkyKamigawa: Neon Dynasty Promos · 200p | Kamigawa: Neon Dynasty Promos | 200p | Mythic Rare | €2.25 |
| Kura, the Boundless SkyKamigawa: Neon Dynasty Promos · 200s | Kamigawa: Neon Dynasty Promos | 200s | Mythic Rare | €4.55 |
| Kura, the Boundless SkyMagic Online Promos · 98055 | Magic Online Promos | 98055 | Mythic Rare | — |
| Kura, the Boundless SkyMagic Online Promos · 98057 | Magic Online Promos | 98057 | Mythic Rare | — |
| Kura, the Boundless Sky // Kura, the Boundless SkyNeon Dynasty Art Series · 66 | Neon Dynasty Art Series | 66 | — | — |
| Kurbis, Harvest CelebrantMidnight Hunt Commander · 27 | Midnight Hunt Commander | 27 | Rare | $0.39 |
| Kurbis, Harvest CelebrantMidnight Hunt Commander · 65 | Midnight Hunt Commander | 65 | Mythic Rare | €0.20 |
| KurgadonScourge · 124 | Scourge | 124 | Uncommon | €0.09 |
| Kurkesh, Onakke AncientMagic 2015 · 153 | Magic 2015 | 153 | Rare | €0.29 |
| Kuroki, Thief of TalentsMystery Booster Commander Edition · 15 | Mystery Booster Commander Edition | 15 | Rare | €3.05 |
| Kuro, PitlordChampions of Kamigawa · 123 | Champions of Kamigawa | 123 | Rare | €0.31 |
| Kuro, PitlordDuel Decks: Divine vs. Demonic · 44 | Duel Decks: Divine vs. Demonic | 44 | Rare | €0.20 |
| Kuro, PitlordDuel Decks Anthology: Divine vs. Demonic · 44 | Duel Decks Anthology: Divine vs. Demonic | 44 | Rare | €0.39 |
| Kuro, PitlordArena Anthology 4 · 15 | Arena Anthology 4 | 15 | Rare | — |
| Kuro's TakenSaviors of Kamigawa · 79 | Saviors of Kamigawa | 79 | Common | €0.17 |
| Kusari-GamaChampions of Kamigawa · 260 | Champions of Kamigawa | 260 | Rare | €1.27 |
| Kutzil, Malamet ExemplarThe Lost Caverns of Ixalan · 232 | The Lost Caverns of Ixalan | 232 | Uncommon | $2.56 |
| Kutzil, Malamet ExemplarThe Lost Caverns of Ixalan · 304 | The Lost Caverns of Ixalan | 304 | Uncommon | $2.18 |
| Kutzil, Malamet ExemplarSecret Lair Drop Tokens · 2782 | Secret Lair Drop Tokens | 2782 | Rare | $4.01 |
| Kutzil, Malamet ExemplarThe List Tokens · LCI-232 | The List Tokens | LCI-232 | Uncommon | €2.12 |
| Kutzil, Malamet Exemplar // Kutzil, Malamet ExemplarThe Lost Caverns of Ixalan Art Series · 50 | The Lost Caverns of Ixalan Art Series | 50 | — | — |
| Kutzil's FlankerThe Lost Caverns of Ixalan · 20 | The Lost Caverns of Ixalan | 20 | Rare | $0.43 |
| Kutzil's FlankerThe Lost Caverns of Ixalan · 355 | The Lost Caverns of Ixalan | 355 | Rare | $0.75 |