Ninjago: The Two Blades

SYNOPSIS

The ninjas learn that the Geckles' and Munces' mutual hatred stems from the fact that each group thinks that the other stole a pair of swords called the Blades of Deliverance, which were given to them by a hero who came to their mountain many years earlier. The hero, whom the Geckles call Gilly, saved them from a dragon named Grief-Bringer and gave them the swords as a farewell gift.