Board Thread:Speculation House/@comment-14138255-20140404003915/@comment-3257939-20140409003938

But Monty said that it carries her weapon in the context that whatever is inside is Velvet's weapon and it has to be out of the box to be wielded. Whatever is inside it's probably not just a single weapon. We all saw that every weapon so far is meant to be a single piece so it can be transformed and carried easily. But if Velvet needs a box then it's probably not just a single piece that transforms and if she's a mage then she has a big set of abilities like Weiss' Myrtenaster.

My best guess is: It's a bunch of different pieces but with the same design each one, the difference is that each one of them has a different purpose, one is for channeling fire and offense, the other is for ice and defense, the other is for lighting, etc. Not just a single weapon but a bunch of them instead.

Boxes are meant to carry a bunch of things not just a single one.