Gamera vs. Guiron

Gamera vs. Guiron (ガメラ対大悪獣ギロン, Gamera Tai Daiakaijū Guiron, Gamera Against Giant Monster Guiron), also known as Attack of the Monsters, is a 1969 daikaiju eiga (giant-monster movie), the fifth entry in the Gamera series. It was one of five Gamera films to be featured as episodes of movie-mocking television show Mystery Science Theater 3000. It is currently in the Public Domain.

This film's antagonist, Guiron (named for "guillotine"), is a giant quadrupedal dinosaur-like monster with a head shaped like a long knife, which is 100 times harder than diamond. Along the knife is a hole that shoots small magnetic shuriken. It also has the ability to fly

Plot Synopsis
Two boys, Akio and Tom, spy in their telescope a spaceship that descends into a nearby field. With Akio's little sister in town, they bicycle out the next day to investigate. The boys enter the spaceship and accidentally take off to an alien planet named Terra, while Tomoko is left behind, unable to convince any adults (except kindly but eccentric police officer Kondo) of the boys' misadventure. On Terra, the boys encounter two beautiful but sinister Terran women and the kaiju Guiron, who kills Space Gyaos. Gamera eventually tracks the boys to Terra and kills Guiron. The Terran women are killed and Gamera, Akio, and Tom go back to Earth

Guiron
Guiron is a Kaiju that appeared in the fifth original Gamera movie, Gamera vs. Guiron, (Known statewise as "Attack of the Monsters"). Due to the lack of distinction in Japanese between the "l" and "r" sounds, Guiron is actually named after the guillotine.

Guiron is an alien monster that normally traverses on all fours, but can also assume a bipedal stance. 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.

Guiron is mostly a melee oriented kaiju, attacking opponents with its blade. Indeed, this blade is so sharp that it can even cut through Gamera's shell. It also has a reflective surface that can send an enemy kaiju's beam attacks back at its opponent. In addition, there is a circular indent on either side of the blade. Housed within are shuriken that it can apparently launch with some kind of psychokinesis.

Guiron acted as the guard dog of two brain-eating space women, the last of a dead civilization on the planet Terra. The aliens guided him with a mind control device. Guiron proved his combat prowess by effortlessly defeating a Gyaos, reflecting its sonic cutter beam and literally slicing it to pieces with his blade. Guiron later fought Gamera, and nearly killed him as well. After a long fight, Gamera eventually managed to defeat the knife headed beast by flipping him upside down - his blade stuck in the earth - then igniting a missile that had gotten stuck in his circular indents, blowing his head off and killing him.

Trivia
Space Gyaos wasn't going to be in this film; a new kaiju was going to be in it, but due to time and budget limitations, the Gyaos props from Gamera vs. Gyaos were simply painted silver. In the Alpha Video U.S. release, the scene where Space Gyaos was killed by Guiron was removed for its graphic content