Board Thread:General Discussion/@comment-7136323-20130414003028/@comment-5398287-20130414050505

Well, it has happened before. During Ichigo Kurosaki vs. Quilge Opie, Quilge did actually begin to absorb the bodies of Arrancar with Sklaverei, so they can absorb the bodies of other beings. My guess is Kubo's not having them do it when fighting against Shinigami so the Shinigami actually have a chance of winning instead of, y'know, being absorbed.

Actually, now that I think about it, that's probably why: the Quincy need Sklaverei to absorb other beings.