is bleach: thousand-year blood war (bleach: sennen kessen-hen) episode 38 filler?

Over a thousand years ago, a young Jugram Haschwalth draws back a wooden arrow in a wooden bow and fires it at a rabbit, which scurries away after the arrow embeds itself in the ground nearby. However, as Haschwalth sighs, a Heilig Pfeil hurtles through the air and pierces the rabbit, which twitches and dies, before a young Bazz-B calls out to Haschwalth from the branch of a nearby tree and criticizes his poor shooting.

When Haschwalth questions who he is, Bazz-B declares that the great Bazz does not need to identify himself first and demands that Haschwalth do so instead, leading Haschwalth to introduce himself.