In a Flash
In the Xiaolin Temple, the monks were racing to get their chores done. Omi was using the Third Arm Sash to scrub the floors while he would be cleaning the windows with his hands. Kimiko was using the Lotus Twister to clean the dirt and grime from underneath the furniture. Clay used the Jetbootsu so he could reach the lanterns and dust them. Rather than do his share of chores, Raimundo used the Shroud of Shadows to hide the dirty dishes in the sink. Rather than use Shen-Gong-Wu, Emily washed everyone's laundry by hand. Max helped her out.
When everyone finished working, they stepped outside to take a break. Max and Emily were engaging in combat practice against each other. They were allies now, so it was important that they trained and fought with each other as they would continue to protect this world.
"You girls oughta be more laid back," Clay suggested.
Kimiko agreed. "We saved the world from Wuya. Take a break."
"There are other forces in the world far more dangerous than Wuya," Emily reminded her. "And we have to be prepared for when we have to stand against those forces."
"Emily's right. If we really did save the world, I wouldn't think it would be important to join you," said Max. "Wuya may be gone, but our adventures are far from over."
Omi understood what they were talking about. "You girls are referring to the Cobalt Star shard you were sent here to find."
Max nodded. "Wuya didn't have it, so that means it's still out there."
"Don't worry so much about it," Clay assured her. "We promised you girls we'd help you find it, and that's what we're gonna do."
"But where are we gonna find it?" Raimundo wondered. "It could be anywhere, couldn't it?"
"Yes, but don't forget, Max and I can sense Cobalt Star shards just like how Dojo can sense Shen-Gong-Wu," Emily replied.
Speaking of Dojo being able to sense Shen-Gong-Wu, he alerted the monks that a new treasure had just revealed itself: the Shard of Lightning. It allowed its user to disappear and move as fast as the speed of lightning. But it would only last for as long as a flash of lightning.
Wuya actually wasn't as gone as everyone assumed. After Raimundo lost the puzzle box after escaping from the crumbling palace, Katnappe found it and took it with her. She opened it and released Wuya. Katnappe knew that Wuya wanted the Shen-Gong-Wu to achieve world domination, but Katnappe wanted to make sure she would get her reward.
While everyone was fighting on the docks, Jack came to try and take the Shard of Lightning that was resting on the cliff. Omi tried to use a technique called the Tornado Strike to stop Jack, but he counter attacked. Clay tried to round him up with his lasso, but Jack spun around, pulling Clay closer, then he unwound himself and got Clay tied up. Jack left his robots to contend with his enemies while he would use his heli-pack to fly to the top of the cliff. Raimundo tried to get there first by climbing, but he was too late.
None of the Xiaolin warriors had any idea what happened or how they were defeated by Jack. They assumed that he had been training to better himself as an opponent and figured that that was what they were going to have to do. They returned to the temple to train in combat. Clay used the Mantis Flip Coin to dodge Kimiko as she was charging in when suddenly, the Coin disappeared and Clay fell on his chest. Kimiko saw a wall blocking her way, but just when she was about to use the Serpent's Tail to go through it, it was gone and she crashed.
Raimundo and Omi were battling each other too. Raimundo was about to use the Eye of Dashi when suddenly, he felt a bucket of cold water being poured over him. Omi looked down and saw that his shoes were pinned to the bridge with nails and his pants were pulled down, revealing his underwear. Also, to his horror, Omi was holding a squirrel instead of the Golden Tiger Claws.
Finally, everyone realized that this was Jack's doing. But they saw not one, but two Jack Spicers. It turned out that the self-proclaimed evil boy genius built a robotic lookalike to sabotage and bamboozle the heroes. And they were using the Shard of Lightning to pull those pranks and steal their Shen-Gong-Wu.
Most of the Shen-Gong-Wu were taken, but a new one had just been revealed in a distant jungle. Dojo brought the heroes before the two Jacks, ready to fight. While the monks were left to contend with the Jack-bots, Jack and his robotic counterpart proceeded deeper into the jungle only to meet up with Katnappe and Wuya. They were racing to find the Shen-Gong-Wu until the timer on Katnappe's watch went off. She said she would only work for Wuya for one hour and that time was through. She was ready to go home and enjoy the spoils she got from Wuya, leaving the witch with nothing.
Wuya scolded herself, expecting such a magnitude of disappointment. She gave everything her ally wanted only to get nothing in return. She asked if she could regroup with Jack once again as they team they used to be, but Jack refused. His robot counterpart was a better companion.
In the nearby tree was the Shen-Gong-Wu they were looking for: the Silver Manta Ray. This biotechnological device worked like a machine from the future. It was an aircraft shaped like a manta ray. The two Jacks touched it at the same time and saw Omi's hand on it as well. It was time to begin a Showdown Trio, the name of the game for three contestants. Omi wagered the Tongue of Saiping, Jack wagered the Shard of Lightning, and the robot wagered the Shroud of Shadows. In the game, players would rumble in the tree and the last one standing would be declared the winner.
The two Jacks charged in to attack, only to end up running into each other. They fought and bickered, paying no attention to Omi. Jack used the Shard of Lightning to sneak up on the robot and attack from behind. The robot used the Shroud of Shadows to use the same tactic and launch a sneak attack. Jack was hanging on the branch, but the robot made him lose his grip and fall.
Omi decided he was going to need help against the robotic Jack. He decided to ask the evil boy genius for help because the robot is supposed to be like him in every way, yet a little better. Perhaps the robot would have the same fighting strategies as the original Jack would. "Jack Spicer, do you seek revenge on your robot counterpart?"
Jack thought it over. "Yeah. Why?"
"Then tell me, what would you do if it was you battling me?"
Jack had a few ideas. "First, I would sneak up on your left, then hit you. And then I'd swift kick you at your feet. And if that didn't work, I'd climb up to the top of the cage, then pounce down on you."
Omi listened and attacked in the exact spots Jack said he would strike from, succeeding in striking and revealing his opponent. He called for more help by using the Tongue of Saiping to command the animals. Hummingbirds swarmed in to attack, Jaguars approached the robot, ready to pounce, and an elephant charged in and sat on the robot. The Showdown was over and Omi was the winner.
When everyone returned to the temple, they used the Shard of Lightning to quickly clean the room. They managed to get it done in three seconds, leaving them with more things to do on their master's list of chores.