Wuya has returned to full power, and Raimundo has joined the Heylin. Teaming up with Jack Spicer, the rest of the Monks use his time machine to send Omi back 1500 years to get help from Grand Master Dashi.
Tropes:
- Backing Away Slowly: When Omi asks Dashi for the secret to defeat Wuya, Past!Dojo thinks he's a nutjob and advises Dashi to start doing this.
- Bait-and-Switch: Raimundo has doubts about ruling the world, and when Wuya talks about how he thought he was going to get everything he wanted, it implies she is going to pull a You Have Out Lived Your Usefulness: Instead, she creates a room full of video games for him to play with.
- Brick Joke: Just before Omi steps into the time machine, Dojo tells him to tell Dashi he was sorry about the shirt, much to Omi's confusion, though Dojo tells him Dashi will know what he's talking about. While in the past, Past!Dojo tells Dashi he accidentally washed his shirt with red socks.
- Didn't Think This Through:
- Jack sends Omi back in time without having a way to bring him back. To be fair, he didn't know how to power the machine enough to travel back in time beyond 2 seconds until Clay brought up the possibility of using the Eye of Dashi as a power generator.
- When Wuya's resurrection breaks the Reversing Mirror, Dojo claims that it means seven years of bad luck for her. However, Wuya counters that since it was the Reversing Mirror, she'd get seven years of good luck instead.
- Foreshadowing:
- As Wuya creates her lair, a frozen Omi can be seen falling from the sky. In "Citadel of Doom", it's revealed that Omi froze himself to wait 1,500 years in order to get back to the present, a flashback even showing the frozen Omi fall.
- Past!Dojo is introduced telling Dashi that he finished hiding the Wings of Tinabi. This Shen Gong Wu turns up later in "Sizing Up Omi".
- Dashi uses the Sands of Time as a timer for his showdown with Omi, several episodes before it becomes active in the episode of the same name. It may not be the same item though, as the design is visibly different.
- My Own Grampa: Dojo brings up this possibility before Omi travels to the past.
- Once an Episode: In what technically proves to be the first Xiaolin Showdown in the show's In-Universe timeline (Dashi hadn't yet come up with a name for the contest at the time Omi showed up), Omi faces off with Dashi to earn a new puzzle box in a challenge where Omi must take a pebble from Dashi before the sands in the hourglass run out, with Omi's Orb of Tornami versus Dashi himself (As Dashi himself states, Screw the Rules, I Make Them!).
- Omi wins after exhausting himself chasing down Dashi, and goes with Dashi's "tact" of simply asking for the pebble, after which Dashi gives it to him.
- Pet the Dog: Wuya rewards Raimundo for assisting her with no strings attached.
- Pragmatic Villainy: When Jack Spicer helps the monks, Omi initially believes he pulled a Heel–Face Turn, but Jack explains that he wants to rule the world, but can't if Wuya is already ruling it. The monks find his logic twisted, but it makes sense.
- Red Sock Ruins the Laundry: Past!Dojo ended up turning Dashi's white shirt pink this way.
- Self-Deprecation: Jack zings the Xiaolin monks a bit too well.Jack: All this time I thought you were these amazing Xiaolin geniuses, but...you're just as lame as I am! Ha ha ha! ...Wait, that didn't come out right.
- When You Snatch the Pebble: Dashi has Omi go through one of these to earn another puzzle box. In this case, all Omi had to do was ask for it politely. The lesson was that defeating Wuya would require an unexpected tactic.
- Worf Barrage: The Apprentice-level skills Omi, Kimiko and Clay learned in the previous episode do absolutely nothing to Wuya.
- You Didn't Ask: This turns out to be the twist to Dashi's Xiaolin Showdown. He challenges Omi to take a pebble from his hand, and reality warps to become an M.C. Escher-inspired maze. Omi chases after Dashi and even uses the Orb of Tornami against him, but he can't keep up and fails at every turn. Just when time is running out, Dashi points out that there's still one possible tactic to try...and Omi proceeds to ask for the pebble, which Dashi happily relinquishes. He explains that he was giving Omi a lesson about thinking outside the box, which is what he'll need to do if he plans on defeating Wuya.
