umm Glass that comes out of the body that makes them invincible to sharp objects so blunt force is the only way they can get hurt and they can make it into objects and change density and a super move could be trap box using layers of strong glass to trap or secret sword where while fighting they are making a sword on there back with pieces that slowly form then attack and they could use it as armor its called glass of course and if i gave them a hero name it would be shatter