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 Cassim. 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). Cassim is able to accumulate a lot of Black Fog to make a huge ball out of it.


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