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 Legality: Legal in legacy, Legal in duel, Legal in commander, Legal in vintage, Legal in oathbreaker Price: $2.18