is bleach: thousand-year blood war (bleach: sennen kessen-hen) episode 35 filler?

As 12th Division Captain Mayuri Kurotsuchi laughs maniacally at the specialized Ashisogi Jizō spawned by his Modified Bankai, Konjiki Ashisogi Jizō: Matai Fukuin Shōtai successfully consuming Sternritter "C" Pernida Parnkgjas and its clones, he swiftly becomes alarmed when the body of the Ashisogi Jizō begins bulging outward in different areas before it is ripped open from within. Elsewhere, the captains and lieutenants running toward the castle are startled by the sensation of Mayuri's Reiatsu fluctuating, though Kisuke Urahara notes that he should be fine.