Secrets of the Forbidden Spinjitzu

Secrets of the Forbidden Spinjitzu is the eleventh season of the LEGO Ninjago series, and the first in what some sources call a "new series." It was originally released on June 22nd, 2019. Kai is the focus character of this season, and Aspheera and General Vex are the main antagonists. The Pyro Vipers and Blizzard Samurai serve as the villainous factions.

It is the first installment in the Book of Elements arc. This season encompasses two Elemental Chapters, the Fire Chapter and the Ice Chapter. Zane and Kai get center focuses, and its villainous factions are retellings of the Serpentine and Stone Samurai Warriors from Seasons 1 and 2. The collectible item for this season are the Scrolls of Forbidden Spinjitzu.

It is the first season animated by WildBrain, and the first to cut episode lengths down to 11 minutes. Dan and Kevin Hageman have fully departed from writing the series, having Bragi Schut take over entirely.

It is preceded by March of the Oni and followed by Prime Empire.