| Knollspine DragonShadowmoor · 98 | Shadowmoor | 98 | Rare | €1.00 |
| Knollspine InvocationShadowmoor · 99 | Shadowmoor | 99 | Rare | €0.32 |
| Knotvine MysticConflux · 114 | Conflux | 114 | Uncommon | $0.36 |
| Knotvine PaladinAlara Reborn · 71 | Alara Reborn | 71 | Rare | €0.21 |
| Knotvine PaladinDuel Decks: Knights vs. Dragons · 10 | Duel Decks: Knights vs. Dragons | 10 | Rare | $0.27 |
| Know EvilArchenemy: Nicol Bolas Schemes · 8★ | Archenemy: Nicol Bolas Schemes | 8★ | Common | €0.27 |
| Knowing // Half the BattleUnknown Event · RZ15 | Unknown Event | RZ15 | Rare | $96.29 |
| Knowledge and PowerJourney into Nyx · 101 | Journey into Nyx | 101 | Uncommon | $0.05 |
| Knowledge ExploitationMorningtide · 38 | Morningtide | 38 | Rare | €2.09 |
| Knowledge Is PowerMurders at Karlov Manor Commander · 42 | Murders at Karlov Manor Commander | 42 | Rare | €0.31 |
| Knowledge Is PowerMurders at Karlov Manor Commander · 352 | Murders at Karlov Manor Commander | 352 | Rare | $0.41 |
| Knowledge PoolMirrodin Besieged · 111 | Mirrodin Besieged | 111 | Rare | €0.75 |
| Knowledge PoolThe List Tokens · MBS-111 | The List Tokens | MBS-111 | Rare | €0.85 |
| Knowledge SeekerAvatar: The Last Airbender · 60 | Avatar: The Last Airbender | 60 | Uncommon | €0.08 |
| Knowledge VaultLegends · 281 | Legends | 281 | Rare | €34.20 |
| Knowledge VaultMasters Edition III · 198 | Masters Edition III | 198 | Uncommon | — |
| Know Naught but FireArchenemy Schemes · 23★ | Archenemy Schemes | 23★ | Common | €4.75 |
| Knucklebone WitchLorwyn · 120 | Lorwyn | 120 | Rare | €7.28 |
| Knuckles the EchidnaSecret Lair Drop Tokens · 2082 | Secret Lair Drop Tokens | 2082 | Mythic Rare | €17.97 |
| Koala-SheepAvatar: The Last Airbender Eternal · 80 | Avatar: The Last Airbender Eternal | 80 | Common | €0.13 |
| Kobold Drill SergeantLegends · 154 | Legends | 154 | Uncommon | €8.62 |
| Kobold Drill SergeantMasters Edition III · 104 | Masters Edition III | 104 | Uncommon | — |
| Kobold OverlordLegends · 155 | Legends | 155 | Rare | $60.03 |
| Kobold OverlordMasters Edition III · 105 | Masters Edition III | 105 | Uncommon | — |
| Kobolds of Kher KeepLegends · 157 | Legends | 157 | Common | €3.16 |
| Kobolds of Kher KeepMystery Booster 2 Tokens · 194 | Mystery Booster 2 Tokens | 194 | Common | $0.79 |
| Kobolds of Kher KeepMasters Edition III · 107 | Masters Edition III | 107 | Common | — |
| Kobolds of Kher KeepMasters 25 Tokens · 10 | Masters 25 Tokens | 10 | — | $1.06 |
| Kobolds of Kher KeepCommander Legends: Battle for Baldur's Gate Tokens · 35 | Commander Legends: Battle for Baldur's Gate Tokens | 35 | — | — |
| Kobolds of Kher KeepDominaria United Tokens · 13 | Dominaria United Tokens | 13 | — | €0.34 |
| Kobolds of Kher KeepMurders at Karlov Manor Commander Tokens · 12 | Murders at Karlov Manor Commander Tokens | 12 | — | — |
| Kobolds of Kher KeepMarch of the Machine Commander Tokens · 27 | March of the Machine Commander Tokens | 27 | — | — |
| Kobolds of Kher KeepPhyrexia: All Will Be One Commander Tokens · 12 | Phyrexia: All Will Be One Commander Tokens | 12 | — | — |
| Kobolds of Kher KeepThe List Tokens · TMKC-12 | The List Tokens | TMKC-12 | — | — |
| Kobolds of Kher KeepTime Spiral Remastered Tokens · 9 | Time Spiral Remastered Tokens | 9 | — | — |
| Kobolds of Kher KeepReality Fracture Commander Tokens · 10 | Reality Fracture Commander Tokens | 10 | — | — |
| Kobold TaskmasterLegends · 156 | Legends | 156 | Uncommon | €4.31 |
| Kobold TaskmasterTime Spiral Timeshifted · 65 | Time Spiral Timeshifted | 65 | Special | €0.35 |
| Kobold TaskmasterMasters Edition III · 106 | Masters Edition III | 106 | Common | — |
| Kobold WarcallerAlchemy Horizons: Baldur's Gate · 59 | Alchemy Horizons: Baldur's Gate | 59 | Common | — |
| Kodama of the Center TreeBetrayers of Kamigawa · 131 | Betrayers of Kamigawa | 131 | Rare | €0.12 |
| Kodama of the East TreeBloomburrow Commander · 227 | Bloomburrow Commander | 227 | Rare | €3.50 |
| Kodama of the East TreeCommander Legends · 239 | Commander Legends | 239 | Rare | €3.86 |
| Kodama of the East TreeCommander Legends · 582 | Commander Legends | 582 | Rare | €3.60 |
| Kodama of the East TreeMagic Online Promos · 86350 | Magic Online Promos | 86350 | Rare | — |
| Kodama of the North TreeChampions of Kamigawa · 222 | Champions of Kamigawa | 222 | Rare | €0.41 |
| Kodama of the South TreeChampions of Kamigawa · 223 | Champions of Kamigawa | 223 | Rare | €0.21 |
| Kodama of the West TreeFoundations Jumpstart · 78 | Foundations Jumpstart | 78 | Mythic Rare | €19.37 |
| Kodama of the West TreeKamigawa: Neon Dynasty · 199 | Kamigawa: Neon Dynasty | 199 | Mythic Rare | €15.01 |
| Kodama of the West TreeKamigawa: Neon Dynasty · 392 | Kamigawa: Neon Dynasty | 392 | Mythic Rare | €21.26 |