Azrael doesn't have manipulate form but he can easily grant it to himself in the same manner that Pun-Pun did (if I'm not mistaken).
Yeah I know, he would basically be Pun-Pun then wouldn't he...the point is to avoid such things from occurring (or having to occur out of necessity). Therefore, I would say the most logical ruling to prevent such things from happening is to declare that manipulate form is incapable of creating abilities that don't exist.
I don't know, that would just be my solution...
Anyway, barring creating abilities that don't exist like
Kill Whoever (Ex) I honestly don't believe there is a way to defeat Azrael...barring that one thing that I still need to check up on. Which, actually, would be a way to defeat pun-pun as well...assuming it works...it's very Aladdin.
One of the kill pun-pun builds might kill him, in that case.
What builds?
The Omniscificer build was, IIRC, specifically created to know about Big P before he ascends and kill him while he's still mortal.
And isn't that still a chicken-or-egg debate that everyone should avoid.
Just FYI, the reason I think we should avoid these types of arguments is because anyone can make them. Any D&D newb with no CO experience whatsoever can make such an argument. Therefore, in light of it not being used against us, I vote that we don't use it ourselves...otherwise, what are we doing here?