The beginning of the OP changed, it looks better now (animation > still images).
Good episode, really liked the first real battle of the series, especially the ink usage and the slow motion. But not everything has to be action and fanservice, so a good amount of story info was revealed as well.
Comedy bits were enjoyable too. Jubei's "normal" form is adorable. And also Sen's tsun-tsun mode
But I wonder why Muneakira was so scared or Jubei? Something related to his samurai code, perhaps?