Karn, Legacy Reforged
Legendary Artifact Creature — Golem
Rarity
Mythic
Mana Cost
Artist
Daren Bader
Power / Toughness
* / *
Oracle Text
Karn's power and toughness are each equal to the greatest mana value among artifacts you control. At the beginning of your upkeep, add
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.
Rulings (3)
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Wizards of the CoastThe mana produced by Karn's last ability can be spent on anything that isn't a nonartifact spell. This includes casting artifact spells, paying costs to activate abilities of both artifact and nonartifact permanents, paying ward costs, and so on.
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Wizards of the CoastKarn's last ability isn't a mana ability, even though it adds mana. It uses the stack and it can be responded to. Use the number of artifacts you control as the ability resolves to determine how much mana to add.
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Wizards of the CoastThe ability that defines Karn's power and toughness works in all zones, not just the battlefield. As long as Karn is under your control and still an artifact, its own mana value will count. In most cases, it'll be at least 5/5.