Mind of the Tempest

Flood — As long as all lands you control are
tapped, Mind of the Tempest has ''Sacrifice a
land: Tap or untap target nonland permanent.''
Whenever a nonland permanent you control
becomes tapped or untapped, target player mills
X cards, where X is the number of tapped lands
you control.
Tendrils of despair mingled with the flesh of the sun's
seers, foretelling the wrath of the falling skies.