User blog comment:Xilinoc/Ch. 633 - FRIEND 3/@comment-24531362-20150702203705/@comment-5398287-20150702223358

Pretty much. I imagine that Yhwach only stole the Vollstandigs to power up and revive his Schutzstaffel: we've seen before with Cang and BG9 that activating it can bring the user back from normal fatal or severely incapacitating injuries, and all 4 Schutzstaffel were in a bad way after getting Nimaiya'd; on top of that, they were clearly not at the level needed to defeat the Royal Guard. Ergo, ANGEL WINGS.