How to Upgrade Bless Refines

You can upgrade Bless Refines in Erion at NPC Ehre:
You need:
2 Sapphires
1 Bless Refine
and 5m Exp Points
Only level 40 Celestial and above can upgrade Bless Refines.
Success rate to make bless refining
150Lv and below : 30%
151Lv – 160Lv : 35%
161Lv – 170Lv : 40%
171Lv – 180Lv : 50%
181Lv – 190Lv : 70%
191Lv and above : 100%
If you succeed, Bless Refine will upgrade, Sapphire will disappear and 5m exp will be deducted.
If you fail, Bless Refine won’t disappear, Sapphire will disappear and 5m exp will be deducted.
What’s the use of upgraded Bless Refines:
First, if you use +1 Bless Refine and above, your item won’t break or disappear anymore.
Second, every upgrade gives you more successrate.