Tob Sarevok's Armor

So, I was thinking about an idea for a quest mod. I do not think that Sarevok in BG1 was gifted the armor, I think he asked some powerful mage\entity to make it, in exchange for something, be it gold, money, soul, and whatever else.

I wonder if anyone would have an interest on making a quest mod, for Tob or SoA, with new areas and what not, where Sarevok, as soon as you are out of Saradush, tells you that there is a place, where you could be able to find a mage\entity, that could be willing to make an armor and a sword based on your essence.

I guess, that if one wanted such mod in SoA, it would be also cool to be given a note by the demon lord in ust nasta, where you ask him for power, he usually kills you, but hey, what if he gives you a note, and suddenly if you read it a new area on the map appears?

One could only imagine the endless possibilities that such a quest could offer.

What is the entity that the demon lord pointed you to?
What does she\he want?
How much are you willing to offer?
How do you empower the armor? [e.g doing evil deeds/hell's trials/Killing the five]
What can change the nature of a man? [ops, that wasn't supposed to be here]