
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.
Karn, Legacy Reforged has 5 printings, first in March of the Machine: The Aftermath (2023). EDHREC ranks it #2,529 among Commander cards. It appears most in Aloy, Savior of Meridian decks (4,465 on EDHREC). It has 3 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.