Subspace

Creation of the subspace was hard and costly, but all of it was worth it as in contrast to the subspace magic in Japanese light novels, the subspace magic in this world was not as simple as just saying 'inventory' to retrieve items 

The subspace magic in this world wasn't like the storage artifact I was carrying around on my belt either. 

It was a superior version of both, as it allowed for the creation of personal space that you could enter and exit at will, while also storing items and living things. 

As I said before, creating was hard and expensive, but fortunately I had the things I needed to create one. A high quality mana core, a minimum of [B] rank, and lots of time. The size of the subspace was determined by the mana core used, so it would be better to use a better mana core instead of just a low quality one. 

Anyway, I took out the blue mana core of the werewolf, which was the most qualitative mana core in my hand, and put it on the ground.