Originally Posted by Henreh
o_O I thought he lost it during the thousand year quest or whatever it was called.
He did. And his left leg too. It's probably the same thing as Erza's eye which she lost when she was still a slave. I don't think it should affect his abilities though unless lost body parts reduces your magical power in the world of Fairy Tail. Then again he seems to only be using his right arm. Hmm...