Instant, U (1)

You may tap or untap target artifact, creature, or land.
Illus. Rob Alexander

10/4/2004: This is not a toggle effect. If you use Twiddle to tap a card and before it takes effect your opponent taps it, Twiddle will not automatically untap the card.
10/4/2004: The decision whether or not to tap or untap is made on resolution. This is not a modal spell.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern