Pirate's Hideaway

Pirate's Hideaway enters the battlefield tapped,
and when it enters the battlefield, create a
Treasure token. (It's an artifact with "{t}, Sacrifice
this artifact: "Add one mana of any color to your
mana pool.")
{t}: Add {c} to your mana pool.
{t}Add one mana of any color to your mana pool.
Spend this mana only to cast a Pirate creature
spell.