| Keeper of SecretsWarhammer 40,000 Commander · 78 | Warhammer 40,000 Commander | 78 | Rare | $8.02 |
| Keeper of SecretsWarhammer 40,000 Commander · 78★ | Warhammer 40,000 Commander | 78★ | Rare | $16.60 |
| Keeper of the AccordCommander Legends · 27 | Commander Legends | 27 | Rare | €0.50 |
| Keeper of the AccordCommander Legends · 621 | Commander Legends | 621 | Rare | €2.51 |
| Keeper of the AccordMurders at Karlov Manor Commander · 70 | Murders at Karlov Manor Commander | 70 | Rare | $0.57 |
| Keeper of the AccordMarch of the Machine Commander · 191 | March of the Machine Commander | 191 | Rare | €0.57 |
| Keeper of the AccordCommander Legends Promos · 27p | Commander Legends Promos | 27p | Rare | €0.73 |
| Keeper of the AccordFallout · 164 | Fallout | 164 | Rare | $0.47 |
| Keeper of the AccordFallout · 451 | Fallout | 451 | Rare | €0.66 |
| Keeper of the AccordFallout · 692 | Fallout | 692 | Rare | €1.84 |
| Keeper of the AccordThe List Tokens · CMR-27 | The List Tokens | CMR-27 | Rare | €0.69 |
| Keeper of the AccordFallout · 979 | Fallout | 979 | Rare | €2.24 |
| Keeper of the AccordMagic Online Promos · 86016 | Magic Online Promos | 86016 | Rare | — |
| Keeper of the BeastsExodus · 112 | Exodus | 112 | Uncommon | $0.24 |
| Keeper of the CadenceThe Brothers' War · 54 | The Brothers' War | 54 | Uncommon | €0.02 |
| Keeper of the Crown // Coronation of the WildsMystery Booster 2 Tokens · 577 | Mystery Booster 2 Tokens | 577 | Rare | €0.13 |
| Keeper of the DeadExodus · 65 | Exodus | 65 | Uncommon | $0.32 |
| Keeper of the DeadThe List Tokens · EXO-65 | The List Tokens | EXO-65 | Uncommon | €0.14 |
| Keeper of the FlameExodus · 85 | Exodus | 85 | Uncommon | $0.19 |
| Keeper of the LensDragons of Tarkir · 240 | Dragons of Tarkir | 240 | Common | €0.07 |
| Keeper of the LightExodus · 8 | Exodus | 8 | Uncommon | €0.20 |
| Keeper of the MindExodus · 36 | Exodus | 36 | Uncommon | $0.30 |
| Keeper of the Nine GalesLegions · 42 | Legions | 42 | Rare | €2.70 |
| Keeper of the Nine GalesThe List Tokens · LGN-42 | The List Tokens | LGN-42 | Rare | €7.83 |
| Keeper of the Quiet HourReality Fracture · 171 | Reality Fracture | 171 | Common | €0.02 |
| Keeper of the Sacred WordUnhinged · 101 | Unhinged | 101 | Common | €0.14 |
| Keeper of the Sacred WordUnhinged · 101★ | Unhinged | 101★ | Common | €0.07 |
| Keeper of the Secret Lair2019 Heroes of the Realm · 2 | 2019 Heroes of the Realm | 2 | Mythic Rare | — |
| Keeper of TresserhornAlliances · 52 | Alliances | 52 | Rare | $0.60 |
| Keepers of the FaithChronicles Foreign Black Border · 9 | Chronicles Foreign Black Border | 9 | Common | €0.64 |
| Keepers of the FaithChronicles · 9 | Chronicles | 9 | Common | €0.05 |
| Keepers of the FaithLegends · 24 | Legends | 24 | Common | $0.34 |
| Keep OutLorwyn Eclipsed · 19 | Lorwyn Eclipsed | 19 | Common | €0.04 |
| Keep SafeIkoria: Lair of Behemoths · 56 | Ikoria: Lair of Behemoths | 56 | Common | €0.12 |
| Keepsake GorgonConspiracy: Take the Crown · 141 | Conspiracy: Take the Crown | 141 | Uncommon | €0.05 |
| Keepsake GorgonTheros · 93 | Theros | 93 | Uncommon | €0.09 |
| Keepsake GorgonPioneer Masters · 293 | Pioneer Masters | 293 | Uncommon | — |
| Keep WatchPlanechase · 10 | Planechase | 10 | Common | €2.50 |
| Keep WatchJudgment · 43 | Judgment | 43 | Common | €0.84 |
| Keep WatchWilds of Eldraine Commander · 98 | Wilds of Eldraine Commander | 98 | Common | €1.59 |
| Kefka, Court Mage // Kefka, Court MageFinal Fantasy Art Series · 46 | Final Fantasy Art Series | 46 | — | €1.73 |
| Kefka, Court Mage // Kefka, Ruler of RuinFinal Fantasy · 231 | Final Fantasy | 231 | Mythic Rare | $4.80 |
| Kefka, Court Mage // Kefka, Ruler of RuinFinal Fantasy · 322 | Final Fantasy | 322 | Mythic Rare | $37.10 |
| Kefka, Court Mage // Kefka, Ruler of RuinFinal Fantasy · 398 | Final Fantasy | 398 | Mythic Rare | €15.25 |
| Kefka, Court Mage // Kefka, Ruler of RuinFinal Fantasy · 496 | Final Fantasy | 496 | Mythic Rare | €14.10 |
| Kefka, Court Mage // Kefka, Ruler of RuinFinal Fantasy · 543 | Final Fantasy | 543 | Mythic Rare | €145.50 |
| Kefka, Court Mage // Kefka, Ruler of RuinFinal Fantasy Promos · 231s | Final Fantasy Promos | 231s | Mythic Rare | €9.42 |
| Kefka, Dancing MadFinal Fantasy Commander · 84 | Final Fantasy Commander | 84 | Rare | $0.34 |
| Kefka, Dancing MadFinal Fantasy Commander · 174 | Final Fantasy Commander | 174 | Rare | $1.33 |
| Kefnet's Last WordHour of Devastation · 39 | Hour of Devastation | 39 | Rare | $0.22 |