Karn, Legacy Reforged
Card Rules and Details
Card Type: Legendary Artifact Creature — Golem
Mana Cost: {5}
Oracle Rules 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 {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.
Set: March of the Machine: The Aftermath (#49), Rarity: Mythic, Artist: Grzegorz Rutkowski
Legendary
Creature
Artifact
Colorless
Mythic
$18.02
Regular
$15.85
✨ Foil
€11.37
Euro
Prices as of Sep 02, 2026. Market values fluctuate; double-check current pricing before purchasing.
Historical Printings & Sets (1)
1 Languages
Official Rulings (3)
2023-05-12
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.
2023-05-12
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.
2023-05-12
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.
🔮 Mechanically Similar Cards
Cards that share similar playstyles, keywords, and mana synergies.
More like this →
⚔️ SmartDeck Builder
Build a deck around Karn, Legacy Reforged
Draft synergistic cards round-by-round, enforce commander color identity, and complete your 99 starting with Karn, Legacy Reforged