Board Thread:Questions and Answers/@comment-43318552-20190729052826/@comment-30938718-20190729203508

Ronan5497 wrote: There's no in-universe explenation about what happend to the arjitzu, but there's maybe one about the elemental dragons

Remember that the elemental dragons can be invoked via controlling your fear, what if after the Wu's disapperance the ninja's fears were up to the point of not being able to use their dragons anymore But Wu is back now.