is one piece episode 673 filler?

At the royal palace's first floor, after fighting through several of Doflamingo's men, Rampo, Kabu, and Thunder Soldier were intercepted by Gladius. The two dwarves attempted to attack him in order for the Thunder Soldier escape, but the officer effortlessly caught them.

Gladius then attacked them with his Devil Fruit powers, knocking them out with the explosions by rupture of his arms. He then went after Thunder Soldier, stating he can't outrun him as a toy.

He tackled the toy soldier from behind and, while explaining his ability, inflated the soldier's head.