The Masters of Spinjitzu must fight off the samurais that are trying to escape through the bottom of the arena. Run, jump and fight around the arena and collect elemental orbs to change into different Ninjago ninja's and use their attacks to kill the warriors. Once you have fought enough of these guys off the golden bell will appear in the middle of the highest point of the stage and you must go get it to turn into the Golden Ninja. Once you have his power you can attack and your power will kill anything around you. Kill as many samurais as you can to keep progressing through the levels.