Sacred Flute

Sacred flutes were once the only thing in all of Ninjago that can control the serpentine. As stated in the legend, the flutes tone drove the serpentine into their individual tombs (not to mention putting the Great Devourer into a long, long sleep). Unfortunatley, people forgot the abilities of the flute as time passed on, hence the only one that still exists belongs to Sensei Wu. Eventually, when the ninja were lured into a trap by the Constrictai and Venomari tribes, Pythor stole the flute, for it to never return. This probably happened because Pythor didn't want the Great Devourer to be lured back to sleep with the flute being played.