A Painful Promise/Ninjago City vs Ninja/Kryptarium Prison Blues/Hounddog McBrag/The Benefit of Grief

Aspheera manages to transform Nya back into her old form. But to do this, Nya has to give up her elemental power. While trying to fight off the new ninja, our heroes are arrested. In prison, they attempt to thwart the escape of an old enemy, and Lloyd welcomes a mysterious masked visitor with a cryptic warning of a new villain. Will Nya, as Samurai X, be able to help the ninja escape? And what's the deal with the mysterious Diamond King?