Warlock Attack 5Avernian Eruption
Acrid orange fumes hiss up from beneath the ground, and then suddenly ignite in a thundering detonation. Any creature in the area is burned by the searing flames.
Daily Arcane, Fire, Implement
Standard Action Area burst 1 within 10 squares
Target: Each creature in burst
Attack: Constitution vs. Reflex
Hit: 2d10 + Constitution modifier fire damage.
Effect: The targets take ongoing 5 fire damage (save ends).
Published in Player's Handbook, page(s) 134, Class Compendium.