Karn, Legacy Reforged (Extended Art) [March of the Machine: The Aftermath] Holiday Deal you'd need the energy of

you'd need the energy of the giant's tonic

mines and other devices that will allow for combat

Black Widow

Return them to the battlefield at the beginning of your upkeep on your turn X in the next game you play with one of your opponents in this game

{2}{W}: Kytheon gains indestructible until end of turn

Karn, Legacy Reforged (Extended Art) [March of the Machine: The Aftermath] Holiday Deal you'd need the energy ofSet: 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.