Blood Thief

EDIT: Added some detail finally, and I need some advice...
I found out that a guy made a guide on Steam about this dragon and used this drawing without asking my permission or giving me any credit, but he didn't alter it (the watermark is still visible). Also he used it since December 2014 and I noticed just now...
Shall I contact him or let it go? :/
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Weee this one took me no less than 20 hours to finish! I'm so dead, my hand hurts so much! Those damn details in the wings, only that crap no less than 3 hours!

And this is for a contest that ends today, so yep, I have to stop here and submit it.
Maybe I'll work on it in the future to add extra detail, but it's ok for now. I'm quite happy with it c:
This is a fan art from a cool videogame, and this is my favourite super-badass dragon, the Blood Thief! And looks like I'm maybe the first who ever posted a fanart of it on the Internet? Couldn't find any reference exept the original art :/

Contest held by about Dreams and Nightmares... and the description of this dragon on their site is quite creepy since it basically feeds with others' blood, so I thought it could fit in someone's nightmare

Blood Thief belongs to whoever the game belongs to sorry I have no idea o.O
Art by
Original concept by Eric Claeys ericclaeys.deviantart.com/