Robin’s discovery of soil sets the foundation for the arc's major revelation regarding the island's true origin and its connection to the Blue Sea.
This episode shifts the tone of Skypiea from whimsical adventure to high-stakes survival. The crew realizes that their usual combat strength might not be enough against the island's unique "God" and his followers. One Piece Episode 160
Zoro, Nami, and Robin continue exploring the forest where they find soil—an anomaly on a "Sky Island" made of clouds. Robin notes the historical significance and the need for further investigation. Robin’s discovery of soil sets the foundation for
The group is bombarded by surprise attacks hidden within floating "cloud balls," making the environment itself a weapon. One Piece Episode 160