Krull is a 1983 heroic fantasy film directed by Peter Yates and produced by Ron Silverman. It stars Ken Marshall as Prince Colwyn and Lysette Anthony as Princess Lyssa. The world of Krull is invaded by The Beast and his army of Slayers, who travel the galaxy in the mountain-like spaceship, the Black Fortress. The 'Attacker' Slayers wear black armor (primarily for night-time assault), while the 'Defender' Slayers wear white armor (signifying the elite guards of the Beast). Both wield weapons that appear to be a (reloadable) one-shot laser rifle on one end coupled with an opposing bladed bayonet end for close quarter combat. The people of Krull on the other hand have only technology equal to that of the Middle Ages or that of The Lord of the rings. The chosen weapon of Colwyn is the Glaive, a boomerang-type of spinning, five-clawed throwing disc that returned to the wielder's hand. It should not be confused with glaive, a medieval polearm. Krull was made into an Atari game soon after its theatrical release.