Confirms that the legend of the Golden City was real, shifting the crew's goal toward finding that gold.
Explains why there is dirt in the sky and connects the Sky Island to the blue sea world. One Piece Episode 164
This discovery vindicates "Liar" Mont Blanc Noland. The golden city he saw 400 years ago didn't sink into the sea; it was blasted into the sky by the Knock Up Stream . Key Revelations Significance Upper Yard = Jaya Confirms that the legend of the Golden City
Following the battle with Shura, Chopper, Gan Fall, and Pierre are in a dire state after falling into the water. Since they are all Devil Fruit users, they face certain drowning. However, they are rescued by a massive flock of South Birds . These birds reveal to Chopper that Gan Fall was once the "God" of Skypiea before being usurped by Enel. The golden city he saw 400 years ago
The episode focuses on two major storylines: the survival of Chopper and Gan Fall at the Sacrificial Altar, and a groundbreaking discovery by the exploration team.