Guiron

Guiron (ギロン Giron) is a knife kaiju created by Daiei that first appeared in the 1969 Gamera film, Gamera vs. Guiron. Guiron is an alien monster that normally walks on all fours, but can also stand on two legs when the situation requires. It is an unusual looking creature, with tough gray skin, a small mouth, sleepy looking eyes and a low, groaning bellow. The most unusual feature of this beast's anatomy, however, is the gigantic blade that it sports on its head, which is nearly as long as its body. His head looks like a hammer head shark.

Powers and Abilities
Guiron is mostly a melee-oriented kaiju. Almost all of his abilities revolve around the massive blade he sports on his forehead. It is strong enough to reflect a blast from a Space Gyaos and cut Gamera's shell. When he can't use his blade Guiron resorts to his secondary attack, a pair of four shurikens stored in two circular indents in the blade. Guiron can guide these shurikens using telepathic waves. They were sharp enough to cut right through Gamera's arms and lacerate his temples to the point of unconsciousness. In addition, despite his bulky appearance, Guiron can be extremely agile in battle, as noticed when he was able to leap high into the air to take down Space Gyaos.