*Spoiler Alert: 怪竜大決戦 film review contains leaks that might bother those of you who haven’t watched it.
Synopsis: In ancient Japan, a good lord is killed and his throne is taken by the trecherous Yuki Daijo and his wizard friend Oroki-maru. The young prince Ikazuki-maru is rescued from the jaws of death by a magic bird sent by a wizard. Ten years later, Ikazuki-maru embarks on an adventure to avenge his parents and the wizard’s death with his magic powers he learned from the wizard. He kills Yuki Daijo but then must battle Oroki-maru in a battle to the death.
Here’s a movie review 怪竜大決戦 (1966) : –