The Grey Werefox has the powers of Stone Mimicry and Petrification. When, the Grey Werefox turns into stone then he has super strength and some degree of invulnerability but he cannot move as quickly as in his flesh state.
While in his stone form, the Grey Werefox can turn others into stone. The Grey Werefox can also turn objects and living beings into stone in his flesh state. The Grey Werefox has powers similar to that of the Grey Gargoyle (Marvel).