User blog comment:B214/Volume 22 spoilers/@comment-27083298-20161115021134/@comment-30289101-20161116110132

Yes, Heaven got wrecked. We know that. It does say "Main" Facilitie, and I'm sure whatever makes the Cards was probably, though not definitely, part of that. Though, I would not consider it illogical for the Brave Saints requiring very little infrustructure to produce, especially on a small, prototype scale to test in the Rating Game and prepare for mass production. I imagine the hard part is the material to make them, which is probably the same or at least similar to the crystal for the Evil Pieces, that may be the real bottle neck. I also wouldn't consider at least some of the infrustructure surviving in at least some way illogical. It very well could have been a side facility on the far outskirts. Or, all of the infrustructure for the cards could be in the Underworld do to it being in early developement and based on the Evil Pieces as a Joint effort. Or a Facility in the human world. Or they just dedicate everything they have to rebuild it from scratch as quick as possible, which may not actually take much effort or time depending on what's actually needed and what can't be barrowed or repurposed from the devils who I'm sure are more than willing to help their allies recover as best they can. The author has many options to go about it if he wants to use it, so again, I'm not seeing how it's illogical.