Name: Coin of Mastery Cost: 4 CMC: 4 Color: CID: Type: Artifact Rules Text: Each creature you control enters with an additional +1/+1 counter on it for each mana from an artifact source spent to cast it. {T}: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Set/Rarity: Teenage Mutant Ninja Turtles Eternal rare Set Code: TMC-R Legality: Legal in oathbreaker, Legal in vintage, Legal in gladiator, Legal in commander, Legal in duel, Legal in legacy Price: $1.97 Foil price: $21.98