Starchaser: The Legend of Orin

Starchaser The Legend of Orin is a 1985 animated scifi adventure film. It was written by animation writer Jeffrey Scott and was originally released in 3D by Atlantic Releasing under their Clubhouse Pictures label. Starchaser The Legend of Orin was one of the first animated movies to mix traditional and computer animation, as well as one of the first to be released in 3D.

When Orin later takes the sword into his hands, it ascends into the air and buries itself in the caverns floor. A projection of an old man appears from the blade, telling those present that above the caverns is a magnificent universe that the people may find they have been told that above the cavern is Hell. The blade then disappears, leaving only the hilt.Forced to leave Orins young, blind brother Calli behind, Orin and Elan set out to discover this universe and find the blade to the sword. Chased by Zygons robots, they emerge in an industrial complex where they meet Zygon, who reveals the face of a human man beneath his mask. Zygon strangles Elan to death, but Orin escapes this fate when Zygon is distracted by the sword hilt. When Zygons robots accidentally fire on a crystal deposit, Zygon presumes Orin dead in the resultant explosion and cavein. ........

Source: Wikipedia