The Shaolin Swallow(1977)

At the beginning of the film, Master Chang is killed by a man dressed in a golden suit (Golden Bird) wearing a mask. The weapon used was called the Poison Phoenix (a stuffed blackbird with poison on its beak) only known to be used by Golden Bird, and the only item missing from the scene is the "Rainbow Sword" - the only weapon that can combat the Zu Ling Knife (sword).