Sorcery, 2R (3)

Arc Lightning deals 3 damage divided as you choose among one, two, or three target creatures and/or players.
"It is vain to look for a defense against lightning." - Publius Syrus, Maxim 835, trans. Lyman
Illus. Andrew Goldhawk

10/4/2004: Each target must receive at least 1 damage. You can't choose a target to take zero damage.
10/4/2004: You can't choose zero targets. You must choose at least one target.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander