The artifact spirit race was a rather special race, and no one knew what their ancestors were thinking. They discovered that moving their souls away from their bodies and placing them in another carrier could greatly increase their understanding of the Heavenly Dao.
The more the soul left the body, the more of the Heavenly Dao one would be able to comprehend, and the more powerful one would be.
The disadvantage of doing so was also very obvious.
All of their comprehension of the Heavenly Dao was done through artifacts.
Therefore, if their souls left their artifacts and entered their bodies, they would not be able to use any techniques at all.
After all, their bodies were not weapons. There was a huge difference between the two, so naturally, the comprehension of their Heavenly Dao as an artifact could not be carried out using the body.