Lego Ninjago: Masters of Spinjitzu
Season 5 focuses on the Ninja fighting the ghost Morro (the Wizard Sorcerer Mage Magician and Master of Wind and Air and Sensei Wu's First Student and Pupil), Morro possesses Lloyd for most of the season. When Morro possesses Lloyd, the ninja lose their powers (for more than 3.5 quarters of the season) and use Aeroblades for most of the season. Morro unleashes a variety of ghost warriors (ghosts) & his mission is to find the realm crystal (a realm that can let its user travel through the 16 realms), & free his mistress,  " The Preeminent" (the physical body of the cursed realm) so she can curse all 16 realms exept Djinjago. On the other hand, Nya is revealed to be the Water Waves Ocean Tides Fluids Ninja, as she is being trained by Sensei Wu. The Ninja and Morro struggle as they go through journeys to master Airjitzu (a Spinjitzu that can fly)  to get the Sword of Sanctuary (a sword that can show the user the opponent's next move), and find the Realm Crystal. At the end of Season 5, Lloyd is free and fights with Morro, at the end Nya unlocks her true potential and destroys the Preeminent, with the cost of Morro dying. (note: the weakness of a ghost is water or deep stone [the aeroblades] ).