Ulban's Flare

Prerequisite: Warlock, star pact
Benefit: When you hit a creature with dire radiance and you have concealment or total concealment from that target, the target takes 2 extra damage and a -2 penalty to attack rolls until the end of your next turn. The extra damage increases to 4 at 11th level and to 6 at 21st level.

Published in Dragon Magazine 381, page(s) 53.