| Kessig WolfriderInnistrad: Crimson Vow · 165 | Innistrad: Crimson Vow | 165 | Rare | €0.22 |
| Kessig WolfriderInnistrad: Crimson Vow · 379 | Innistrad: Crimson Vow | 379 | Rare | €0.22 |
| Kessig WolfriderMagic Online Promos · 95361 | Magic Online Promos | 95361 | Rare | — |
| Kessig Wolf RunCommander 2020 · 284 | Commander 2020 | 284 | Rare | $0.41 |
| Kessig Wolf RunCommander Legends: Battle for Baldur's Gate · 898 | Commander Legends: Battle for Baldur's Gate | 898 | Rare | €0.23 |
| Kessig Wolf RunInnistrad · 243 | Innistrad | 243 | Rare | $0.63 |
| Kessig Wolf RunThe Lost Caverns of Ixalan Commander · 340 | The Lost Caverns of Ixalan Commander | 340 | Rare | €0.15 |
| Kessig Wolf RunModern Horizons 3 Commander · 352 | Modern Horizons 3 Commander | 352 | Rare | €0.33 |
| Kessig Wolf RunMurders at Karlov Manor Commander · 269 | Murders at Karlov Manor Commander | 269 | Rare | €0.08 |
| Kessig Wolf RunMarch of the Machine Commander · 410 | March of the Machine Commander | 410 | Rare | €0.33 |
| Kessig Wolf RunNew Capenna Commander · 411 | New Capenna Commander | 411 | Rare | €0.40 |
| Kessig Wolf RunSecret Lair Drop Tokens · 355 | Secret Lair Drop Tokens | 355 | Rare | €13.27 |
| Kessig Wolf RunTarkir: Dragonstorm Commander · 375 | Tarkir: Dragonstorm Commander | 375 | Rare | €0.34 |
| Kethek, Crucible GoliathPhyrexia: All Will Be One · 206 | Phyrexia: All Will Be One | 206 | Rare | €0.15 |
| Kethek, Crucible GoliathPhyrexia: All Will Be One · 319 | Phyrexia: All Will Be One | 319 | Rare | €0.20 |
| Kethek, Crucible GoliathPhyrexia: All Will Be One · 465 | Phyrexia: All Will Be One | 465 | Rare | €0.81 |
| Kethek, Crucible GoliathPhyrexia: All Will Be One Promos · 206p | Phyrexia: All Will Be One Promos | 206p | Rare | €0.25 |
| Kethek, Crucible GoliathPhyrexia: All Will Be One Promos · 206s | Phyrexia: All Will Be One Promos | 206s | Rare | $0.45 |
| Ketria TriomeIkoria: Lair of Behemoths · 250 | Ikoria: Lair of Behemoths | 250 | Rare | €12.54 |
| Ketria TriomeIkoria: Lair of Behemoths · 310 | Ikoria: Lair of Behemoths | 310 | Rare | €15.19 |
| Ketria TriomeIkoria: Lair of Behemoths Promos · 250p | Ikoria: Lair of Behemoths Promos | 250p | Rare | €14.47 |
| Ketria TriomeIkoria: Lair of Behemoths Promos · 250s | Ikoria: Lair of Behemoths Promos | 250s | Rare | €15.07 |
| Ketria TriomeThe List Tokens · IKO-250 | The List Tokens | IKO-250 | Rare | €15.36 |
| Ketria TriomeMagic Online Promos · 80951 | Magic Online Promos | 80951 | Rare | — |
| Kevin, Questing DragonUnknown Event · RR08a | Unknown Event | RR08a | Rare | $69.99 |
| Key to the ArchiveAlchemy: Innistrad · 59 | Alchemy: Innistrad | 59 | Rare | — |
| Key to the CityThe Brothers' War Retro Artifacts · 27 | The Brothers' War Retro Artifacts | 27 | Rare | €0.28 |
| Key to the CityThe Brothers' War Retro Artifacts · 90 | The Brothers' War Retro Artifacts | 90 | Rare | €0.54 |
| Key to the CityThe Brothers' War Retro Artifacts · 90z | The Brothers' War Retro Artifacts | 90z | Rare | €55.57 |
| Key to the CityCommander 2019 · 216 | Commander 2019 | 216 | Rare | €0.20 |
| Key to the CityCommander 2021 · 248 | Commander 2021 | 248 | Rare | €0.28 |
| Key to the CityFinal Fantasy Commander · 348 | Final Fantasy Commander | 348 | Rare | €0.23 |
| Key to the CityKaladesh · 220 | Kaladesh | 220 | Rare | €0.27 |
| Key to the CityKaladesh Promos · 220s | Kaladesh Promos | 220s | Rare | €1.05 |
| Key to the CityKaladesh Remastered · 248 | Kaladesh Remastered | 248 | Rare | — |
| KezzerdrixSecret Lair Drop Tokens · 826 | Secret Lair Drop Tokens | 826 | Rare | €4.27 |
| KezzerdrixTempest · 139 | Tempest | 139 | Rare | $0.54 |
| KezzerdrixTempest Remastered · 107 | Tempest Remastered | 107 | Rare | — |
| Khabál GhoulMasters Edition · 75 | Masters Edition | 75 | Rare | — |
| Khabál GhoulMagic Online Promos · 215 | Magic Online Promos | 215 | Rare | — |
| Khârn the BetrayerWarhammer 40,000 Commander · 79 | Warhammer 40,000 Commander | 79 | Rare | $5.68 |
| Khârn the BetrayerWarhammer 40,000 Commander · 79★ | Warhammer 40,000 Commander | 79★ | Rare | $16.16 |
| Kher KeepCommander 2013 · 303 | Commander 2013 | 303 | Rare | €0.33 |
| Kher KeepCommander Legends: Battle for Baldur's Gate · 899 | Commander Legends: Battle for Baldur's Gate | 899 | Rare | €0.23 |
| Kher KeepMurders at Karlov Manor Commander · 270 | Murders at Karlov Manor Commander | 270 | Rare | €0.15 |
| Kher KeepMarch of the Machine Commander · 411 | March of the Machine Commander | 411 | Rare | €0.23 |
| Kher KeepPhyrexia: All Will Be One Commander · 157 | Phyrexia: All Will Be One Commander | 157 | Rare | €0.21 |
| Kher KeepThe List Tokens · MKC-270 | The List Tokens | MKC-270 | Rare | €0.22 |
| Kher KeepThe List Tokens · TSP-275 | The List Tokens | TSP-275 | Rare | €0.53 |
| Kher KeepTime Spiral · 275 | Time Spiral | 275 | Rare | €0.48 |