Watch Sword of the Valiant (1984) HD Full Movie Free on solarmovie.do. Watch Sword of the Valiant (1984) online free. The Green Knight challenges King Arthur's knights. But only young Gawain accepts and decapitates him...The Green Knight challenges King Arthur's knights. But only young Gawain accepts and decapitates him. The knight takes his head and now gives Gawain one year to learn about virtues, knighthood and then face the challenge himself.