Wyper leads the Shandia warriors in a full-scale raid on Upper Yard to reclaim their homeland from Enel.
Luffy, Zoro, Robin, and Chopper are attacked by a massive snake (Nola) while heading toward the southern ruins, causing the group to split up.
The file refers to the 168th episode of the anime One Piece in Italian. Episode Overview
Chopper finds himself alone at the sacrificial altar and encounters Ohm, one of the four priests. Kibamuku Uwabami! Tsui ni Hajimaru Survival Game - IMDb
The episode marks the beginning of the "Survival Game" on Upper Yard: