POW + 3.
Atk + 5 and P.Atk + 3 per 20 base POW of the user.
If the enchanted equipment is grade D, additional P.Atk + 1 per 20 base POW.
If the enchanted equipment is grade C, additional P.Atk + 2 per 20 base POW.
If the enchanted equipment is grade B, additional P.Atk + 2 per 20 base POW.
If the enchanted equipment is grade A, additional P.Atk + 2 per 20 base POW.