"I mean, we lead strange lives so I cannot guarantee you will not suddenly be offered a chance to become two trillion times more real at the price of your magic. And, come that day, it might be important for you to understand that this is not at all the same thing, under the Law, as creating two trillion importantly different versions of yourself having diverse experiences."
"But, I mean, if you turn out to have the option of asking me first, you probably should."
"Oh, and you asked about permission, I should answer explicitly. No problem if you can afford the comms bandwidth someday to ask Hell about it, but I predict they answer that they need an unmanageable amount of detail about your psychology, or say '85% likelihood that if we knew everything about a random fourth-circle wizard we'd tell them blah blah blah, but it's incredibly hard to actually learn for individuals'."