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After fleeing The Speedway Five-BillionLloyd, Jay, and Nya set their sights on the final Keytana, which is hidden in the level known as Terra Domia. Upon entering the world, the three briefly reconsider, only for the entrance to disappear. The first stage proves to be a sidescrolling level, forcing the trio to try and learn the rhythm of the level in order to advance. Unfortunately, all three end up losing one life, leaving all of them with only one remaining before they become energy cubes. At last, they manage to progress to the next stage, which proves to be a difficult infinity maze.
Desperate to reach the end of the level, the Ninja stumble across a loot box, which proves to contain a power up that enables them to get through the maze. They then enter the final stage, an arena, in which one of them must face a boss battle. Lloyd volunteers himself, but is taken aback at the site of his opponent: a virtual clone of Harumi. Acting as though she's the real deal, the copy messes with Lloyd's head, until he manages to think of a way to determine whether or not she's genuine. Exposing her as a fake, Lloyd is able to defeat her, but loses his last life in the process and is cubed. Jay and Nya obtain the final Keytana, and Jay becomes more determined than ever to find Unagami and put an end to things.
Spoilers end here.
Using a power up, Nya is able to use Airjitzu; this is an ability none of the Ninja have used in the series since prior to the release of The LEGO Ninjago Movie, with no in-universe explanation being given for its discontinuation. She also yells out "CYCLON-DO!", which was Jay's nickname for Airjitzu in the Possession season.