|Manga Debut||Chapter 311|
By compressing and concentrating the power of the Mountain Flame, Rauji is able to create a powerful armor which takes the shape of a massive jaw, which he calls Strong Jaw.
The armor is able to open up and release Mountain Flame looking similar to wings on a beetle. It is also able to form armor over his jaws which he is able to concentrate his flames through. This flame can be compressed to resemble rocks and then by covering them in flames to somewhat resemble magma. This creates two horns of flames extending from the armor on his jaws similar to horns on a stag beetle.