Buster Keel Wiki
Ox Devil Gun
Kanji 牛魔砲(ぎゅうまほう)
Romanji Gyūmahō
Type Offensive
User Gyuumaou
Manga Debut Chapter 21

An energy attack and Gyuumao's strongest weapon, capable of making a laser like blast that causes a giant waveof destruction. This technique was able to make both Keel and Blue go unconscious from its power. It seems to be exclusive to his giant form.