Krull (1983)

Watch Krull: In the face of total annihilation by the omnipotent Beast's unstoppable hordes of Slayers, the young aristocrats of two hostile neighbouring nations--the brave Prince Colwyn and the fair Princess Lyssa--are about to come into union, and form an alliance against the common enemy. However, the otherworldly adversary is all-powerful, and before long, a fateful abduction will trigger a desperate quest to the evil entity's grim Black Fortress, as Colwyn and a handful of mismatched defenders are willing to dice with death to ensure the land's future. In this suicide mission, the magical, five-edged weapon known as the Glaive is their only chance of survival. Can Prince Colwyn slay the Beast,...