Power Stone

{p/b}{p/b}{p/b}{t}: Destroy target permanent
{p/b}{p/b}{p/b}{p/b}{p/b}{t}: Exile target permanent.
{x}{x}{{p/b}{t}: Deal X damage, divided as you choose, to any number of targets.
{p/b}{p/b}{p/b}{p/b}{p/b}{p/b}{p/b}{p/b}{t}: Destroy all nonland permanents, other than Power Stone.