I've read the skill 20 times and done as many internet searches, and I just can't figure out the answer: Does Brimstone Blast deal damage on the initial hit if the opponent fails their reflex save?
Any creature struck by a brimstone blast must succeed on a Reflex save or catch on fire, taking 2d6 points of fire damage per round until it takes a full-round action to extinguish the flames or the duration expires. The fire damage persists for 1 round per five class levels you have. For example, a 15th-level warlock deals 2d6 points of fire damage for 3 rounds after the initial brimstone blast attack.
Does the round you deal damage count as "a round" -- is it saying "yes dummy you do eldritch damage + 2d6 on the round you attack, plus up to 4 additional rounds," or is it saying "melf's acid arrow, bub." The source of my confusion is that the wording that is completely different from how Melf's is worded (which is quite clear on how it works).