I've seen that costume before!
For the sake of anyone that might be interested, the character pictured is named Breynz, and the costume is worn by Tarangryph. They've got lots more photography of the suit on their Deviantart page, and apparently it's inspired a Creepypasta and an SCP Object.
I wish I had several thousand dollars to spare on something like this...My Halloween would be awesome. o_o