I wondered what the hell was going on with this battle. Neither Raze nor his minions could hardly damage me as I was tough as nails. But every time I got his hitpoints down to a certain level, he simply healed himself. There was absolutely no way to stop him, the levers were useless, despite the 'hint' that they were important. I counted, and he healed himself fully 16 times before somehow I was able to take him down. What a tedious, awful fight.
