Turathi Highborn Question

[Negflar2099]

Does anyone know if the Turathi Highborn's Hellfire Action power works only on Melee and Ranged attacks or does it work with Area and Close attacks as well? If so does it add the extra fire damage to every attack in the burst or blast area or does it only add the extra damage to a single creature?

Thanks.

 

[Danceofmasks]

"Did I spend an AP to make this attack? Yes? Then it applies."
It sure looks like it adds to every target of a fireball.