Having some trouble with finding where this one was traced from, but I did find out something worth mentioning that probably ties into why I can't find the source: The left hand of this character has been used by the "artist" at least two times before, in post #3852754 and post #3877233. So basically the "artist" has started copy-pasting limbs as well, which is going to make finding the source hella difficult.

Did find the source of the background though, post #2567405.

*Edit* Oh hey, I think I found the source of the right hand; post #4903394.