In 3rd edition he can have all those kick stealth skills to run away. He managed to evade a more powerful red dragon then firkrag and now that he has icing death he could sneak up on and lay the smack down on any red dragon. Besides firkrag only had 1 wizard and he was a wimp and if firkrag killed drizzt then malchor harpell would be after him and he would commit suicide to get away from that annoying bastard.
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Meet my lawyer.