Mu Yuan pondered, "Normal cultivating artifacts either enhance cultivating speed or provide certain soul power experience."
For the same artifact, an elite-level user might level up two or three grades, but for a Leader Level user, it might not even result in half a minor upgrade.
This is normal.
The power an artifact possesses is a constant.
However, this object before him, presumably called 'Upgrading Stone', is quite special. An Apprentice Level user can level up three grades, and a Leader Level user can also level up three grades.
This is its rule.
"Duo Lai, the organization has decided that you will use this gemstone. Progress towards the Legendary Realm as soon as possible."
Only with a Legendary Realm figure in place, can Tianyuan Territory be considered somewhat secure.
Otherwise, Lord Shepherd would worry about waking up one day to find the Legendary figure of an enemy country or a monster at his doorstep.
This isn't paranoia from being persecuted by Dead Bone.