Burning Breath

Paragon Tier
Prerequisite: 11th level, dragonborn, dragon breath racial power that deals fire damage
Benefit: Choose one creature hit by your dragon breath. That creature takes ongoing fire damage equal to your Constitution modifier (save ends).
Choose one creature hit by your dragon breath. That creature takes ongoing fire damage equal to your Constitution modifier (save ends).

Published in Player's Handbook Races: Dragonborn, page(s) 24.