March of the Machine: The Aftermath
Karn, Legacy Reforged
5Legendary Artifact Creature — Golem
#149
All printings
Karn'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.
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