So reading this chapter i was kinda reminded of Byakuya's fights, he and Yhwach have similar abilities, his shadows look like Ssnbonzakura or like Garras sand, he just stands there. So maybe Yhwach has the same "safe zone" as Byakuya that will later in the seriea hunt him? And i have a feeling that ISSHIN will use his bankai or mugetsu, and burn all of Yhwachs shadows or something hebwill have a big role in the fight.