I am pretty sure I saw something like this in a Bugs Bunny / Daffy Duck cartoon:

Apparently, though, this guy is "Chondu the Mystic", whose origin seems as mashed-up as his body. He's "The Mystic" because he dabbled in the arcane, but science transplanted his brain into one of the Defenders. Later of course (of course!) magic once again stepped in to re-transplant his brain into the body of a fawn (Dr. Strange is a right cold bastard sometimes), and it was only later that his former friends re-re-transplanted his brain into the current monster form. Whether that last was through science or magic is unclear, which is saying something given the insanity that has already been described.
In the high-falutin' world of art criticism (and stop me if this language gets too technical for you), this character design is what we would call "Bad". Generally you want to keep it simple, pick a theme and stick with it, but sometimes when you're on deadline and you're riding the Heroin Horse, you get a result like this.
More likely, someone created a "Comic Book Affirmative Action Committee" and they were given the task of putting together a character who could stand for the traditionally underrepresented parts of the animal kingdom. Thus:
- Equines: Unicorn horn, check.
- Reptiles: Snake tongue, check.
- Bowels of Hell: Demon wings, check.
- Avians: Eagle legs, check.
- Sea Life: Lamprey arms, multiple, check check check check check check check check. (Seriously, lampreys for arms?!)
I'm fairly disappointed that they kept humans as the Mammalian representative here; surely the powerful Bacterial Lobby could have done more to make their case.
(Image and character © Marvel Comics.)
I believe the proper expression for a situation like this is “Whiskey Tango Foxtrot?” (WTF?) Oh Jeff, if only you’d given us THIS as a caption contest entry!
Thought balloon: “Forget about destroying the world! I just wanna find the !@#$%^&* who did this to me!”
…or…
“Forget about destroying the world! Somebody tell me how the hell I’m supposed to use the bathroom like this!”
darn, John beat me to it. I was thinking….”Dammit! I gotto pee. Somebody help me.”
If they made a movie with this guy in i his theme would probably be the looney toons theme.
And then he would say, “No, not there. I don’t pee from there anymore.”