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Karn, Legacy Reforged

matMarch of the Machine: The Aftermath#49mythic
{5}
Treatments
Foil
Market price · TCGplayer
updated 2026-06-21
Nonfoil$16.47
Low $13.99Mid $17.20Buylist
Foil$15.12
Low $11.00Mid $16.83Buylist
All finishes · 30d
updated 22h ago
Nonfoil$16.47 +15.0%
Foil$15.12 +2.2%
Card details
Artist
Grzegorz Rutkowski
Frame
legendary
Language
EN
Border
black
Security stamp
oval
Format legality
AlchemyNot legal
BrawlLegal
CommanderLegal
DuelLegal
Future StandardNot legal
GladiatorLegal
HistoricLegal
LegacyLegal
ModernLegal
OathbreakerLegal
Old SchoolNot legal
PauperNot legal
Pauper CommanderNot legal
PennyLegal
PioneerLegal
PreDHNot legal
PremodernNot legal
StandardNot legal
Standard BrawlNot legal
TimelessLegal
Tiny LeadersNot legal
VintageLegal
Oracle text

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.

P/T*/*
Abilities
StaticKarn's power and toughness are each equal to the greatest mana value among artifacts you control.
TriggeredAt 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.
Plays as
Artifact PayoffTribal Payoff
Flavor & art
Illustrated by
Grzegorz Rutkowski
Rulings
  • WotCMay 12, 2023

    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.

  • WotCMay 12, 2023

    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.

  • WotCMay 12, 2023

    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.