Increases the P.Atk of an A-Grade weapons such as sword/one-handed, blunt/one handed, dagger, spear and etc. type by 4. The P.Atk of sword/two-handed, blunt/two-handed, dual swords, and fists type will increase by 5 and bow type by 8. The M.Atk of all weapons will increase by 3. From +4, the added bonuses for P.Atk/M.Atk are double the above value. When fail on enchanting, item does not get crystallized but it's enchant value will return to 0.