If you a One Piece fan, then chances are you been curious as well as to what lead to shank scar on his left eye.
The above just a theory but then it makes a little sense.
If you recall when shank and blackbeard aka teach met in marine fold, blackbeard talked about the scar and how it suit, in otherwords he was actually mocking him.
Well like I said the above just a theory so don't assume its right or not