On this part while I agree, i'd like to add in the bit where he basically wrecks you'r whole castle, possibly some people included you might have cared about. Also he is draining souls somewhat nonchalantly on his casual stroll in the countryside.
Not exactly Irenicus levels of personal hook, but it was a decent enough hook for my vindictive-atheist-****, and then fancy-nice-pants Watcher.