Fiction is a Healing style that can only be used by All.
Lost Caster Magic
All's Fiction allows him to deny aspects of reality; to make anything "nothing". Because of this, he can undo anything that has been damaged, and thus he has no qualms about being destructive. However, he has stated that once he removes something with his Magic, he cannot return it as it has become "fiction". His ability can even reverse his own death as well as the death of others. He admits that he doesn't have full control of his power because, unless he's careful, the entire world would become nothing