Correct me if I'm wrong, but I thought D&D was about heroes and heroic deeds. It seems to me, this PRC is way out of blance. I just don't see one being able to destroy a whole world. Possibly a chain reaction of events can cause this, but no one single person should be capable of this without going insane. Two, the Apocalyptic Warrior. If he is not capable of plane travelling, how is he exempt from the destruction of his (home) planet? Meaning how can he escape death himself? If there is no plane or atmosphere, how is he supposed to breathe in an expanse o fnothing? Just some thougths.