Dragonslayer (1981)
The sorcerer and his apprentice Galen are on a mission to kill an evil dragon to save the King’s daughter from being sacrificed according to a pact that the King himself made with the dragon to protect his kingdom. princess, virgin, sacrifice, self sacrifice, magic, secret identity, solar eclipse, sorcerer's apprentice, amulet, lottery, brood, human sacrifice, sorcerer, cross dressing, dragon, hidden identity, landslide, sword and sorcery, 6th century
ETC.
