He-Man and the Masters of the Universe S02 E11 Rattle of the Snake

"A sword will choose a master, a boy will become a man, and a hero will be born."

The Masters are called to Spelea, where they discover Lord Dactys and his warriors defending themselves from a Caligar attack. While King Randor mediates a truce between Lord Dactys and Ceratus, the Snake Men take advantage of the distraction to enter the Temple of Serpos, intent on awakening the Guardians of Old...