The spatial technique has existed since ancient times.
Although no one knows who started it, it's just been there, and it hasn't changed much over these years.
After all, the function of this technique is mainly to hide treasures, open mansions, and create concealment.
Of course, the more stable and safer, the better.
The more you do, the more mistakes you make; the less you do, the fewer mistakes you make. Normal people wouldn't tamper with their storage magical artifacts or opened cave mansions.
After all, at best, you lose everything, at worst, you die on the spot.
Ordinary spatial magical artifacts are also not cheap, they are not consumables like talismans, and regular people cannot afford them.
And because they are a primary source of income for artifact refiners.
Even if some apprentice disciple wants to mess around, the usual outcome is getting hung up and beaten by their master for three days.
