C.RATE + 2, increases critical damage by 5%.
If refine rate is 7 or higher, increases critical damage by additional 3%.
If refine rate is 9 or higher, increases critical damage by additional 3%.
If grade of enchanted equipment is D or higher, CRI + 2, increases critical damage by 4%.
If grade of enchanted equipment is C or higher, additional CRI + 3, increases critical damage by additional 5%.