Treasure tokens are artifacts that can be tapped and sacrificed to add one mana of any color. Treasure decks create them in bulk for acceleration, fixing, sacrifice triggers, and artifact synergies.
Revel in Riches can win the game for stockpiling ten Treasures, while Magda, Brazen Outlaw turns five of them into a Dragon or artifact directly from your library. Academy Manufactor can make each Treasure-producing effect part of a much larger token engine.