Karn, Legacy Reforged (Extended Art) [March of the Machine: The Aftermath] Frog Beast Set: Outlaws of Thunder Junction

Set: Outlaws of Thunder Junction Type: Creature — Human Knight Rarity: Common Cost: {4}{G} Trample

Whenever you cast a creature spell

Sneaking behind people

You may cast that card by paying an amount of {E} equal to its mana value rather than paying its mana cost

Karn, Legacy Reforged (Extended Art) [March of the Machine: The Aftermath] Frog Beast Set: Outlaws of Thunder JunctionSet: March of the Machine: The Aftermath Type: Legendary Artifact Creature Golem Rarity: Mythic Cost: {5} Karn, Legacy Reforged's power and toughness are each equal to the greatest mana value among artifacts you control. At the beginning of your upkeep, add C for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.