Atk + 2%.
If refine rate is 7 or higher, additional Atk + 3%.
If refine rate is 9 or higher, additional Atk + 4%.
If refine rate is 11 or higher, P.Atk + 3.
If grade of enchanted equipment is D or higher, Atk + 2%.
If grade of enchanted equipment is C or higher, additional Atk + 3%.
If grade of enchanted equipment is B or higher, additional Atk + 4%.
If grade of enchanted equipment is A or higher, P.Atk + 5.