Stone-prowess Soullord

{t}{x}{u}{u}: Exile all non-land permanents with a converted manacost X. Return them to the battlefield at the end of the turn.
{t}{x}{w}{w}{w}{w}: Exile all non-land permanents with a converted manacost of X.
{t}{x}{w}{w}{w}{u}{u}{u}: Put all non-land permanents exiled with Stone-prowess Soullord onto the battlefield under your control.