Burning Arc

This spell causes an arc of flame to leap from your fingers, burning one enemy nearby plus one additional enemy per 3 caster levels, each of which must be within 15 feet of the primary target. It deals 1d6 points of fire damage per caster level (maximum 10d6) to the primary target. For every additional target, reduce the number of damage dice by half (rounded down). Each target can attempt a Reflex saving throw for half damage.