Jade Books In Heaven/Book of Thoth Items of Power

[Judanas]

I was pondering how possible it would be to have a Sorcerer who's source of Evocation and Thaumaturgy are an Item of Power along the lines of the Jade Books in Heaven or the Book of Thoth? They don't have power themselves but they have an artifact with more than enough innate mumbo jumbo to give them the power?

[Sanctaphrax]

Easy.

Take the Item of Power power and attach the powers you want to it.

[Judanas]

Easy.

Take the Item of Power power and attach the powers you want to it.

Oh yes, I meant fluff-wise. Should I use Evocation and Thaumaturgy for it or would it be more of a 'Sponsored Magic' thing?

[Sanctaphrax]

Either would be fine.