Spell Damage shade

Hello, I’m sure the information I need is somewhere, but I can’t find it and thought someone here could help…

To do gray (or white) shaded damage you need a gray (or white) shaded weapon. Spell casting is similar in that a gray shaded skill does not give you gray shaded damage. How then do you get the ability to do a higher shade of damage? Is it possible to enchant/craft something and what would you need?

Thank you for any help you can give.

Most spell damage is based on the caster’s Will. Thus you need a gray-shade Will to do gray shade damage.