In , titled " The Secret Plan to Turn the Tables! Nightmare Luffy Makes His Appearance! " , the Straw Hat Pirates find themselves in a desperate fight against the giant zombie, Oars , who is being piloted from the inside by the Warlord Gekko Moria .
While the main crew is being beaten, Luffy is in the Thriller Bark forest. He meets a group of victims who have had their shadows stolen by Moria. They reveal a secret: if a person has a strong enough spirit, they can "host" the shadows of others to temporarily gain their skills and strength. One Piece (Dub) Episode 370
The episode marks a major turning point in the Thriller Bark Arc. Initially, the Straw Hats were holding their own against Oars , but once Moria climbs into the "cockpit" in Oars’ stomach, the giant gains Moria's tactical brilliance. In , titled " The Secret Plan to Turn the Tables