Dawnreach, City of Starlight

Dawnreach, City of Starlight enters the battlefield tapped.
{t}: Add {w}, {u}, {b}, or {g} to your mana pool.
{t}: Exile Dawnreach, City of Starlight, then return it to the battlefield under your control.
Said to only appear during a blue moon, this province is home to impossible magics and wondrous mysteries.