These were the two most well-known secondary professions among warriors and mages. It wasn't easy to engrave holes and insert crystals. Those who could engrave holes on weapons were definitely warriors above level 7, while those who could insert crystals must also be mages above level 7.
The nine holes corresponded to the early stage, mid-stage and final stage. The more holes on the weapon, the more Magic Beast Crystals could be inserted and the more powerful the person who engraved the holes. Almost everyone that had weapons wanted to engrave holes and the number of holes was directly related to the power of the weapon, so it was certainly the more the better. And yet, there might be a lot of warriors at the advanced level, but there were differences between their ability to control their power. Although there were many Weapon Refiners among warriors, there were just a few masters and it was hard to make a hole in the weapon.
