Centennial Twister Triad

You may exile a Plains as a part of Twister
Triad's, casting cost, if you do reduce the cost
by {w}{w}{w}
{c} counts as {2} when casting Twister Triad.
(You may cast a legendary sorcery only if you
control a legendary creature or planeswalker.)
Exile three permanents. You may return one
permanent not exiled from this casting of
Twister Triad that you own to play.
"Trees, farms, whole towns can be torn from the
earth. Perchance a girl might be moved unharmed."