Stormy Weather

Forecast - {1}{w/u}{w/u}, Reveal Stormy Weather
from your hand: Tap or untap a target creature
you control, and do the same for a target
creature you don't control. (Activate only during
your upkeep and only once each turn.)
Whenever a creature you control becomes
tapped, tap a target creature you don't control. Whenever a creature you control becomes
untapped, untap a target creature you don't
control.