Acinvarian Museum

Acinvarian Museum enters the battlefield tapped.
If an effect would add {g} to your mana pool, it adds {c} instead.
{t}: Add {w}, {u}, {b}, or {r} to your mana pool.
Acinvar is filled with bustling streets and travelers in a rush. But if you bother to look off of the beaten path, you will discover treasures.