It’s incomplete but I was brainstorming a transmuter hatsu idea this is what I got so far:

• BLACK BOX (Transmutation)(Conjuration) - The user transmutes and conjures up dense black boxes 📦 that contain nen dimensions. The boxes are able to store physical, chemical, and metaphysical objects(Aura) within the dimension where time doesn’t reach. Using manipulation the user can control the boxes up to a certain distance based on the user’s skill. The weight, Shape, and Dimensions of the boxes can also be changed by the user. For example, the user could flatten the dimensions of boxes into tiny slashes that can be used offensively. Or they can flatten them and use each one as a platform to walk on or even use manipulation to fly on one.

Uses: • Storage • Offensive Slashes • Flight using boxes • Box Attacks

Now the part where I’m confused if this could work or not is this:

• I want to add an aspect to the boxes that allows the boxes to make a “copy” of whatever is inside. Wouldn’t conjuration accomplish? What would be the limits?

For example say, the user who is a transmuter who is up against a enhancer like uvogin. The enhancer throws out an attack on the same level of Big Bang Impact, could the box make a “copy” of the impact after storing the aura from the attack?

Basically the Boxes would be a storage and copy machine. Is it reasonable to be able to conjure something like this? Any conditions or limitations would help as well.