Smaug, the Hoarder

When Smaug, the Hoarder enters the battlefield, create 5 colorless Treasure artifact tokens with
"{t}, Sacrifice the artifact: Add one mana of any
color to your mana pool."
When Smaug dies, the controller of that spell or ability or creature that dealt lethal damage to
Smaug creates a legendary colorless artifact token
named The Arkenstone with "{t}, Sacrifice this artifact: Add ten mana in any combination of
colors to your mana pool."