is one piece episode 358 filler?

As Luffy faces Moria, the latter warns that even if he is beaten, the shadows will never make it back to their rightful owners, so Moria says that it is he who decides whether the shadows can go back or not. He also dares Luffy to try and make him.

Luffy uses a Gum-Gum Pistol to hit him, but it's actually a decoy, the Doppelman. Moria says that he will have his pawns make him the Pirate King and also says that Oars desires that title.

Moria also says that zombies with the victim's shadow will mimic the personalities, but it won't be long before they become eternally loyal to him.