You fling your arm in a wide arc, casting liquid fire at your foes.

At-Will   ✦     Arcane, Fire, Implement
Standard Action      Close blast 3

Target: Each creature in the blast

Attack: Charisma vs. Reflex

Hit: 1d8 + Charisma modifier fire damage.
Level 21: 2d8 + Charisma modifier fire damage.

  Dragon Magic: The next enemy that hits you with a melee attack before the end of your next turn takes fire damage equal to your Strength modifier.

Published in Player's Handbook 2, page(s) 138.