take over Grey

Nicolasmillioni: spoilers to SKIN GAME IN MY NEXT QUESTION! (#s Is goodman grey able to steal magic from wizards like the first naagloshi we ever saw could?)
Jim: He /can/, but it's ruinously costly for him. The more you become something other than you are, the less of you is left over. He could, theoretically, get a gulp of Dresden's blood and become Dresden, power and all--but, especially with such a powerful will in question, he would /be/ Dresden at that point. There wouldn't be anything of /Grey/ left over to make decisions. It would basically be a form of suicide, only with a really hard-on-buildings corpse left over.
The Naagloshii themselves, as immortals, are immutable. Grey has free will.


2015 Reddit AMA (https://www.reddit.com/r/books/comments/3lye65/comment/cvajpk3/?utm_source=share&utm_medium=web2x&context=3)