Lightning summoned by your attack arcs from the target to strike a second foe.

Encounter   ✦     Lightning, Primal, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. Reflex

Hit: 1[W] + Strength modifier lightning damage, and one enemy marked by you, other than the target, must choose either to fall prone or to take 5 lightning damage.

  Stormheart: Whatever its choice, the marked enemy takes lightning damage equal to your Constitution modifier.

Published in Primal Power, page(s) 95.