Rules:
*You can teleport into and out of it at will
*It has a couple of plug sockets and can connect to internet from the region you teleported in from
*You can take objects and people with you
*As already stated, it is 3m^3. The walls are plain plaster with a light in the middle of the ceiling. The pocket dimension is topologically toroidal, so if there weren’t walls and a ceiling/floor (which you can actually destroy) you would loop if you went more than 3m in any direction. Gravity, then, is artificial and can be altered to anywhere from 0 to 2g from a dial on the wall.
Knov’s nen ability was such a cool idea. Using it as a killing floor for Netero to pick off the chimera one by one was brutal.
I’m surprised that didn’t plan to use it to trap Meruem somehow. Netero could have slapped Meruem into one of the portals.