Karn, Legacy Reforged (Foil Etched) [March of the Machine: The Aftermath] March of the Machine "The Realm of Sauron is

"The Realm of Sauron is ended forever

Spells from the chosen plane cost W

then create X Treasure tokens

pay life equal to its mana value rather than paying its mana cost

exile Nissa

Karn, Legacy Reforged (Foil Etched) [March of the Machine: The Aftermath] March of the Machine "The Realm of Sauron isSet: 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.