Every 20 base INT, Matk + 10, SPL + 2, CON + 2.
If the enchanted equipment is grade D, S.Matk + 6, increases all property magical damage by 6%.
If the enchanted equipment is grade C, additional S.Matk + 9, increases all property magical damage by additional 10%.
If the enchanted equipment is grade B, additional S.Matk + 12, increases all property magical damage by additional 14%.
If the enchanted equipment is grade A, additional S.Matk + 15, increases all property magical damage by additional 18%.