Instant, 2UU (4)

Choose artifact, creature, or land. Tap all untapped permanents of the chosen type target player controls, or untap all tapped permanents of that type that player controls.
The best cure for a big ego is a little failure.
Illus. Dan Scott

10/4/2004: You decide on resolution if you are tapping or untapping, and which kind of permanent you are affecting.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander