[Raynor]

Originally Posted by Boro

At Pelennor Fields his is not limitted anymore.

I know of no limitation of the mission of the WK. He was supposed to get the ring, that was his job. Irregardless of Gandalf's musings, the attack of the nazgul with the morgul blade had more to do with Frodo striking at him and crying the name of Varda than with a supposed addendum to his mission.

Aye, but Tolkien also refers to the Nazgul as sorcerers...and it is also the 'great wizard' Gandalf who calls the Witch-King a 'great sorcerer.'

I believe I have conveyed my point; I know of no minimum requirement of magic display in order to qualify as a sorcerer. Thus, implying that the WK must have displayed such powers before because he was called a sorcerer is uncalled for.

Originally Posted by obloquy

However, note that he is talking about the Witch-King receiving the "force" and the command from two separate givers, as indicated by his need to specify that the Witch-King received the command from Sauron specifically.

I believe that's a false dichotomy. I see no reason why the phrase can't mean he received the force from Sauron too. While I agree that the phrase can be viewed from your point also, it is definitely not the only one, especially considering the larger context.

That's every bit as impressive as breaking a gate, right?

Nope; not even a fraction of its efficacy and power. It is one of the occasions I repeatedly referred to when the WK uses his power at far lesser levels than the situation requires and his supposed power permits. Also, the timing of it, the fact that the WK bids his time for 14 days and uses it in his 25th hour, when Frodo is already on enemy land, beyond the waters he rightly fears, shows that this is more for show and spite than for practical uses.

the Witch-King accomplished all manner of death and destruction (which no other Nazgul did)

What different manners of death and destruction do you have in mind? And how do you know the other nazgul didn't do them?