wraiths powers????

well the way i understand it, there power comes from sauron, so they are dependent upon his survival. there power is not there own it is his. so basically if you kill a wraith you kill the shell, the host, and of course saurons power lives on. that is just the way i always thought it was.

The reason it was never to be heard again, Turin, is that the One Ring was destroyed just after!

well like i said, there are many ways to interpret it. after going back and reading it i see your point. its just that looking at it again i still feel he was destroyed. there is evidence that points either way so you just got to go with your gut.

I haven't read the whole of this post cause I'm knackered. But as to how powerful the Witch King is?

According to Lord of the Rings (this is without reading any other books BUT LOTR), he has leveled cities HIMSELF 🙂 That should give you an idea how powerful he is 😛