The Golden Hour

After throwing the Reversal Time Blade to Kai and Nya and off the Iron Doom, Wu prepares to face Krux and Acronix but is struck with reversal energy from the inside of the vehicle. Striking Wu's staff, the Time Twins are transported with Wu to the Fire Temple, where they see past versions of Kai and Lloyd. Krux attempts to change the past, but Wu stops him and unintentionally transports himself and the twins back to the Iron Doom, becoming younger in the process.

Krux and Acronix deduce that Wu is being affected by the energy of the Reversal Blade, which is allowing the Iron Doom to continue moving through the temporal vortex. They attack Wu again and are transported to the Temple of Light. Wu stops the Time Twins from interacting with the past ninja and the three are warped back to the Iron Doom once again.

Next, Wu and the Time Twins are transported outside the Monastery of Spinjitzu while child Wu and Garmadon spar with katanas on the other side of the wall. As the young Great Devourer lurks nearby, Wu's katana flies over the wall. Wu stops Acronix from picking up the sword and laments that while he wishes he could change this moment, as doing so would prevent Garmadon's transformation to evil, he knows he cannot.

Wu and the twins continue to warp across several time periods, eventually ending up back on the Iron Doom, where Wu has de-aged into a child. Krux mocks Wu's new form, and Wu throws his staff at Krux and runs toward the time apparatus. When Acronix protests against this, Wu responds that the Hands of Time are no more than "second-hand thugs" before touching the apparatus with the Reversal Blade's energy inside him to halt the Iron Doom entirely.

With the Iron Doom broken and completely still, an infant Wu floats through the temporal vortex.