is one piece episode 973 filler?

Although Orochi initially scoffed at Oden's suggestion, Kaidou accepted the challenge, agreeing to release the retainers if they survived one hour in the pot. Oden entered the pot, already being singed by the boiling oil.

The retainers run on the plank to also get in, but Oden lifts the plank up, allowing his retainers to sit safe from the boiling oil. Kaidou allowed him to do this, since they were technically in the pot.

Less than a minute passed and Oden already struggled to lift the plank. It forced Oden to stand on the bottom of the pot, and his veins burst from the pressure.