Any magic that affects the mind is considered dangerous and challenging magic.
The human mind is the most mysterious thing in the world, it easily accepts the memory magic of increasing knowledge, but if you try to erase or change a part of personal memories, the subconscious mind will resist fiercely.
During these researches, new magic was discovered, which does not change one's memories or character but forces one to carry out whatever command is asked of him. It was called slavery magic. The slave or servant would be forced to carry out all the orders of his master.
This magic skill story goes back to one of the oldest battles, in humans' wars against the Oris. At that time, humans transformed the captives of the Oris and the rest of the factions, such as dwarves, elves, and half-beasts, into slaves.
