is one piece episode 371 filler?

Oars uses a Gomu Gomu no Kane to throw the Straw Hats around. He then uses a Gomu Gomu no Yari to stretch his legs down hard on the crew.

Zoro wonders how Oars became so powerful. Moria explained that he used Shadow Revolution extending his shadow down to Oars.

With that, Oars can extend his body parts almost like Luffy does. Moria then turns Oars' shadow into a ball, making him a ball as well.

Oars rolls towards the crew and suddenly stops and demands that he be the one to finish things. Moria orders Oars to pick off the Straw Hats one-by-one.