NowonSA posted:

It's putting a cubic mile for now (expanding later surely) in your bag of holding and making it a realm that only you and people you let in can enter, and that you always bring with you.

We haven't seen quite how fast stuff can be pulled out of there yet, but having a literal pocket Bossmon seems like a very viable possibility. Since it seems to have a liquid form like his other golems, it seems like it can just funnel in and out of there.

Plenty of people have subspaces, the real exploit here has to be how his is portable and always accessible to him with a single word wherever he goes. He can have any amount of hidden allies, support items, etc. in there. If he can set up time dilation in it like he has in his training room, then at any point in a fight he should now be able to hop into his subspace, activate quick thinking, and get a huge time advantage on his enemies (with a possible disadvantage of his subspace having a fixed exit point that he'll have to come back out of, once he enters into it). Maybe Jee-Han has enough wisdom to realize and capitalize on all this stuff, we'll see.