You allow the hated elemental energy in your soul to swell forth and scour your foes.

Encounter ✦     Acid, Cold, Fire or Lightning
Free Action      Personal

Trigger: You hit an enemy with an attack

Effect: Your attack deals 3 extra acid, cold, fire, or lightning damage to the enemy.
Level 11: This attack deals 6 extra damage.
Level 21: This attack deals 9 extra damage.

Published in Dragon Magazine 383, page(s) 75.