User blog comment:AYET/The Terracotta Army - Zoro vs Pica/@comment-4374114-20140602145208/@comment-4374114-20140604154711

True, each case we have only seen him create a wall. Will have to wait and see if we get a case of him forming more than one side in the upcoming battle that I'm sure he will be a part of.

Maybe it can be a barrier ball, so to fit with your mention of it kind of being only one piece of glass :)  Always got to look for the loop holes, LOL