The service of designing one's own training grounds according to their wishes was actually quite liked in the game. Although it was slightly limited to some extent, it was an enjoyable experience for players who like to feel like they are living in the game world itself.
However, experiencing that in real life is so much better.
The place I have chosen was close to nature itself. The reason why people with spatial magic attributes are sought is related to the things like these. Since with the existence of spatial magic, you can design a magic tool that can customize such a subspace. However, it has different attributed mana in it as well.
Anyway, this magic engineering is a little complex for me to understand its structure right now, so let's leave it like that.
Here is the chapter, hope enjoyed it. I won't extend this training arc for long, time skip is close.