Gamera vs. Barugon

Gamera vs. Barugon (1966) is a fantasy, action, science fiction directed by Shigeo Tanaka rated 6.4/10.

Gamera escapes from his rocket enclosure and makes his way back to Earth as a giant opal from New Guinea is brought back to Japan. The opal is discovered to have been an egg that births a new monster called Barugon. The creature attacks the city of Osaka by emitting a destructive rainbow ray from his back, along with a freezing spray capable of incapacitating Gamera.