It's an older Miranda Leigh commission.
http://www.transfur.com/Users/Mirand...bmissions/6451
It's a WoW Night Elf being used as "raw materials" to resurrect a Troll via transformation + personality transfer.
The story it's based on is called "Proud of her Origins", but I can't remember where it came from, and my copy doesn't have the author listed. It was for-pay, so I won't be uploading it.