Edit:It just occurred to me that the singular form is Inferious:facepalm, or something like that. Please excuse me while I fail.

Ok, so Inferious!Harry is not really the basic premise of the fic I'm looking for, it's just the only clear image of it that I have.
I remember some time ago that I read a story which I quite liked (at the time at least) where Harry went vigilante. I think that for a period he was wearing something read and went by "Phoenix" or some similar crappy name, but can't be sure. What I do remember is that his first public appearance with the crappy suit was in Azkaban, where he went to do god-knows-what.
What I'm sure of is that he dies at some point, but Dumbledore, aware of the Prophecy, refuses to let him pass on, and uses Necromancy to bring him back as a sort-of inferi.
Then, after all is well (and Dumbledore is dead) Harry is lead to use the same ritual that Voldemort used in GoF to regain a healthy human body.

Again, I am not sure as to the quality of this fic. It could be shitty for all I remember. All I know is that I liked it at the time and that I'd like to give it another spin, if possible.
Any ideas?

 

This: Time, Mr. Potter?