You call upon the hellfire burning in your soul to punish your enemy.

Encounter   ✦     Fire
Free Action      Close burst 10

Trigger: An enemy within 10 squares of you hits you.

Target: The triggering enemy in the burst

Effect: The target takes 1d6 + Intelligence modifier or Charisma modifier fire damage.
    Level 11: 2d6 + Intelligence modifier or Charisma modifier fire damage.
    Level 21: 3d6 + Intelligence modifier or Charisma modifier fire damage.

Update (11/16/2010)
Updated to match Essentials data.

Published in Player's Handbook, page(s) 48, Player's Handbook Races: Tiefling, page(s) 6, Heroes of the Forgotten Kingdoms, page(s) 270.