Karn, Legacy Reforged 
Legendary Artifact Creature — Golem*/*
Oracle text (EN)
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 
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.
Printing details
- Set
- MAT · 149
- Rarity
- Mythic
- Language
- EN
- Artist
- Grzegorz Rutkowski
- Released
- 2023-05-12
- Prices
- – · $21.41
Price history
The trend shows with at least 7 days of history.
- Cardmarket, trend
The history starts on October 28, 2026 and grows every day.
Show the data
| Date | Cardmarket, trend |
|---|---|
| October 28, 2026 | €0.39 |
Prices
| Source | Non-foil | Foil |
|---|---|---|
| Cardmarket | low – trend €0.39 30-day avg €0.39 | low €5.78 trend €13.70 30-day avg €13.29 |
| CardTrader (EN) | NM from – | NM from €21.69 with Zero from €21.69 |
| CardTrader (any language) | NM from – | NM from €8.14 |
Cardmarket updated Oct 30, 2026 · CardTrader updated Oct 30, 2026
Buy and look up
Legality
- standard Not legal
- pioneer Legal
- modern Legal
- legacy Legal
- vintage Legal
- commander Legal
- pauper Not legal
- alchemy Not legal
- brawl Legal
- competitivebrawl Legal
- duel Legal
- future Not legal
- gladiator Legal
- historic Legal
- oathbreaker Legal
- oldschool Not legal
- paupercommander Not legal
- penny Legal
- predh Not legal
- premodern Not legal
- standardbrawl Not legal
- timeless Legal
- tlr Not legal
Rulings
-
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.
-
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.
-
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.