Dead to the World
Another great artifact: the Sword of Kas. The +6 defender status is only part of its known powers. It causes double damage to any extraplanar entity. It has one prime power, and that could end up being a daily death spell or meteor swarm. And it is consistently evil, highly manipulative, and will attempt to control the user at every opportunity.
I know that if this sword started to command me, I would be right on board, I seldom play a good aligned character; as you know, it is neural evil or bust for this guy. When the sword that I scooped out of the treasure trove starts telling me to use fireball and lightning bolt after raising my major attribute one point, I am listening. Better than listening to that stupid paladin or cleric.