Castle of the Clouds

Castle of the Clouds enters the battlefield tapped
{t}: Add {w}{u},{u}{g}, or {w}{g}
{w}{w}{1},{t}: Target creature gains Double strike and Vigilance until the end of turn
{u}{u}{1},{t}: Counter target noncreature spell
{g}{g}{1},{t}: Search your library for a land card, reveal it and put it into your hand. Shuffle your library afterwards