Karn, Legacy Reforged'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 (Future Sight) [Mystery Booster 2] | Grognard Games](http://grognardgames.com/cdn/shop/files/038b1b24-e823-40c2-8fa4-7193854037d3_ef9c0f7a-f078-4477-8ae4-593afd4db6e2.png?v=1755020654)
