Argentum Nexus

This card enters the battlefield tapped.
{t}: Add one mana of any color.
{3},{t}: Put a sun counter on target land you
control. That land gains "{t}: Add one mana
of any color." for as long as it has a sun
counter on it.
{w}{w}{u}{u}{b}{b}{r}{r}{g}{g},{t}: Destroy all creatures
your opponents control.
The last uncorrupted part of Mirrodin, and its
final hope.