Hellish Blast

Heroic Tier
Prerequisite: Tiefling, warlock, eldritch blast power
Benefit: Whenever you use eldritch blast, you can choose for it to deal fire damage. If you do, it gains the fire keyword and you gain a +1 bonus to the damage roll. The bonus increases to +2 at 11th level and +3 at 21st level.

Published in Player's Handbook Races: Tiefling, page(s) 26.