Kokubaku Mutou

Kokubaku Mutou (黒縛霧刀 （コクバクムトウ）, Kokubaku Mutou, Sword of the Black Binding Fog) is the Dark Metal Vessel of Kassim. It is in the form of a sword and utilizes Gravity Magic to attack. This creates a fog that is as heavy as lead and once covered in it, it can immobilize even those as strong as Morgiana (though not entirely). Kassim is able to accumulate a lot of Black Fog to make a huge ball out of it.