What is Petrification?
Petrification, a sub-category of transmutation, is the power to forcibly transform the target, whether it be a person or an object, into stone or other inorganic material. In mythology, Perseus and Medusa could cause men to turn into stone simply by the unfortunate victims casting a glance at her. Although this power doesn't usually work in this precise fashion, the result is always the same. This power can be used to bypass durability, but users with resistance to transmutation/matter manipulation might be unaffected by petrification.