Instant, WU (2)
Uncommon
Untap any number of target creatures. Prevent all combat damage that would be dealt to and dealt by those creatures this turn.
"Relent, and you may transcend your situation."
—Gerda Äagesdotter,
Archmage of the Unseen
Illus. Terese Nielsen

9/16/2007: Energy Arc can target untapped creatures. The second part of the effect will still affect them.
9/16/2007: The number of target creatures may be zero.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander