Yeah, and a bit of advice: Don't Kill Firkagg once you have rescued the child because you miss out on a lot of experience if you do! You can Kill him, but wait a little while, until your actually told to kill him.
But hey, you can kill him whenever you like, I did and I don't think it matters that much
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Nicodemus Deathslayer, Paladin of the Order of the Holy Flame