User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-162.205.216.169-20150709063502/@comment-3965848-20150711063241

I have another theory, it's kinda far fetch but it's sorta of an insane twist and I just feel like saying it.

Remember in vol 17 when we thought that they would capture Rose for making a formula about unsealing Trihexa but it turned out it was to re-seal it, well what if that's exactly what they're after so Qlippoth has a seal strong enough to hold Trihexa in a SG for Rizevim to use and control.