If anyone is thinking of looking for the power source in Volskygge and you are below level 15, I strongly reccomend you reconsider unless you have some serious anti-undead capability. I was at lvl 10ish and blew through all the other zombies in there in no time with my silver swords, but at the end I met a Drough Death Overlord that just mopped the floor with me. When you see a zombie in full battle armor actually sitting on a throne like Dracula from Castlevania before he gets up to face you, you know you are in for one bitch of a fight.