Gig Harbor, City of Wealth

When Gig Harbor, City of Wealth enters the battlefield, sacrifice it unless you pay {r/g} or {u}.
{t}: Add {c} to your mana pool. You get a wealth counter.
{t}: Add {r}{g}, {u}{r}, or {u}{g} to your mana pool. Activate this ability only if you have 3 or more
wealth counters.
{t}: Add {u}{r}{g} to your mana pool. Activate this ability only if you have 8+ wealth counters.