Each blow ignites your blade in deadly green fire.

At-Will   ✦     Arcane, Fire, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Intelligence vs. AC

Hit: 1[W] + Intelligence modifier fire damage, and you deal fire damage equal to your Strength modifier to all enemies adjacent to the target.
Increase damage to 2[W] + Intelligence modifier at 21st level.

Published in Forgotten Realms Player's Guide, page(s) 27.