The 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.
MTG · Card
◇ Catalog #99
Karn, Legacy Reforged
mat·#99·mythic·showcase
Illus. Daren Bader
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in vault
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for trade
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wishlisted
May '23
3 yr ago
Value
$16.55$0 (-2.3%)
30 days high $16 · low $15
Volatility · moderate
Tracking since · May 5, 2026
EUR€13.62TIX0.02 tixUSD
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Played in EDH
EDHrec rank #2,567 · Niche pick
Variants
Gameplay
Legendary Artifact Creature — Golem
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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Legalities
tlrnot legal
duellegal
brawllegal
pennylegal
PreDH
Rulings · 3
wotc
wotc
Karn'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.
wotc
The 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.
Notes
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Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Daren Bader
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