» Wed Nov 21, 2012 12:38 am
I did an experiment and an ordinary Black Soul Gem caught Vyrthur. The Black Star will also catch him, but if you want to lock him away in a chest or something an ordinary gem would be better.
Edit: The experiment I did with Harkon didn't catch any soul. I tried with Azura's Star, an ordinary Black Soul gem and The Black Star. It may be that I would need a longer Soul Trap effect on him, since there is a bit of time before the last time you hit him and when he actually dies.