I've seen it. 2 problems:

1) It's significantly inferior to Spiteblade, to the extent that I'm not sure it's worth switching away from Malchazeen for, and
2) I'm in the #2 guild on the server, and the #1 guild has been monopolizing Kazzak so I haven't actually had a chance to kill him yet.

I don't think there's quite enough energy for that - I suspect it because a 5s/5r/3e (or so) cycle, and I'm not sure if that's actually better. But again, I haven't thought about it in great detail.