After Katnappé releases Wuya from the puzzle box, the two form an unhealthy alliance. Jack builds another robot, but this time, it's a clone of himself, who is much quicker, smarter, and gets all the good jokes. Jack and his clone use the newest Shen-Gong-Wu, Shard of Lightning, to freeze time and quickly steal most of the Warriors' Shen-Gong-Wu. The Warriors must think of a plan to stop them, while Wuya starts to regret teaming up with Katnappé.

Jack and Wuya have a new minion - Cyclops, a one-eyed monster that's short on brains but long on strength and size, who is seemingly unstoppable. In order to combat this new threat, Omi simultaneously uses the Changing Chopsticks and Reversing Mirror to super-size himself. But size isn't everything, as Omi soon learns.

The Warriors are having trouble working together as a team. After finding the Mind Reader Conch, each Warrior uses it to see what the other thinks about them, which only continues their problems. Jack introduces his latest invention, the Molar 2000, which he uses to break into the Temple vault, stealing most of their Shen-Gong-Wu. The Warriors team up with Jack's visiting cousin, Megan, to try and retrieve what's rightfully theirs.

After Kimiko accidentally breaks the Mosaic Scale, she hides the pieces in Clay's room. The next day, Clay starts acting weird ... and acting up. It turns out that the Mosaic Scale was used to contain a mischievous spirit named Sabeeny, an earwig who has possessed the Dragon of Earth. If Sabeeny finds the Monarch Wings, the sister Shen-Gong-Wu to the Scale, and combines them with the Mosaic Scale, it will no longer need a host! The earwig will become invincible! Can the Warriors stop Sabeeny?

The Warriors travel to Texas once again looking a new Shen-Gong-Wu but run into some trouble as soon as they get there. The Black Vipers, an all-girl motorcycle gang, capture the Warriors and keep them prisoner in a cave. Clay learns that one of the bikers is his sister, and that she's been holding a grudge against him their whole life. Can the Warriors escape unharmed?

Upon seeing the rare Heylin comet circling the Earth, Master Fung orders the Warriors to not use any Shen-Gong-Wu for three days. The comet makes the Wu have a mind of their own if used by anyone. Wuya sees this as an opportunity to tempt the Warriors to use the Wu. After using the Golden Tiger Claws and Sword of the Storm to save his hometown from a volcano eruption caused by Jack and Wuya, Raimundo literally becomes attached to the Claws. The Shen-Gong-Wu begin to have a mind of their own and attach to Raimundo, making him 'monster-like'. Once Raimundo loses all his self control, Wuya plans to take over his body and finally carry out her plans to rule the world.

After trapping Chase Young in the Sphere of Yun, Jack and his newest partner, Cyclops, take over his lair. He then proceeds to attack the Xiaolin Temple, stealing Shen-Gong-Wu from the vault. Omi later frees Chase using the Reversing Mirror, returning the 'favor' he owed him from earlier. The other Warriors do not know Omi freed him. Chase slowly tries to mold Omi into the true evil warrior he knows the young monk will become.

After Jack inadvertantly releases the world's most biggest and powerful spiders, the Warriors, Jack, and Chase Young temporarily team up to stop the spiders before they proceed to consume the world. Kimiko, Raimundo, Clay, and Jack are captured while Chase and Omi escape. To look for an answer on how to defeat the spiders, they combine the Fountain of Hui and Eagle Scope. Will Omi and Chase be able to find the answer and put an end to the spiders' reign?