This was in the PTR. Are they even supposed to spawn? It had purple name and was bigger then usual. Couldn't really tell if it had more health though, killed it kinda fast. But the big bummer was that it just dropped two blues for me haha=/
Theory - Could he be the one to drop the last piece to open up the new uber boss runs?
I think they ignored 1 piece of item so we could try to search for it without find it. No documents are found yet that we have meet uber-diablo, baal or mephisto in PTR / Beta. If this is the case, this unique goblin might be the one dropping it once the item is in the game!?