...Cam double-checks this real quick with especially tiny models, then dumps the especially tiny models into the Albanian forest.

Yup, same dude collective of random objects.

"I know you suspected he was still alive, but what does it mean that he's in multiple locations? And that one of them is mister Potter's scar?"

"I believe he may have undertaken certain Dark rituals to preserve his immortality, and that the diary and other objects tie him to existence. I will need to think on the implications regarding the child."

"Are we talking possession, reincarnation, backup copy, respawn location, telepresence -"

"He is currently lacking a body, but one of his followers may be able to restore him to one. He made an attempt at the Philosopher's Stone last year while possessing someone, and had he obtained it that would have sufficed."

"Good to know and not what I asked."

"The items are what enables him to exist without a body, rather than passing on to what comes next."

"In... what way. - it is like the nineteen nineties and probably wizards don't read a lot of science fiction, I apologize, I'm asking what kind of interactions he is having or will have with the various locations in which he exists. Are those locations passively storing information about his experiences moment to moment for him to pick up in case he loses access to whatever his main storage is? Can he act through those locations in any way, especially the Harry location? If you don't know, can you tell me about past instances of similar magic being used so I can forensic it?"

"I do not believe him to be interacting with them at all. They tie his soul to this world; he will become mortal if they are destroyed. Harry's case is stranger, and I know of no precedent for it. He has mentioned his scar hurting when Voldemort is nearby."

"...okay. Do you think it's the same kind of thing as the other ones different only in that it's applied to a kid's head?"

"I fear, or perhaps hope, that it is not. Multiple forms of rare magic were interacting that night, and I cannot imagine that Voldemort intended this or any other of the consequences."

"Wait a moment--you said he will become mortal if they are destroyed. What does that mean for mister Potter's safety?"

"I assure you, Minerva, I will take all reasonable steps to sever the connection without harm to the boy."

"I am not an expert in this sort of magic but it doesn't seem very large. It's centered right on the scar, which is pretty superficial and has nothing else to extend into beyond his forehead in the outward direction. One could maybe just carve it out and I can put back some non-magical skin, I guess maybe also some skull if it's got some deeper bits? It'd be pretty invasive as mundane surgery goes but I could expect to do it in about five minutes without a twinge, though I dunno what your state of the art is or how much the soul anchor would object to the process."

"The diary had a sense of self-preservation, of a sort, but then it seems to have been much more powerful. The one in mister Potter has been left unattended for years with no noticeable effect."

"The one thing that gives me pause is his ability to speak Parseltongue. The Potters have no family history of the talent, and Voldemort was famously capable. It suggests that the . . . anchor, may have interacted with his brain."

"Eesh. Okay, there I run into medical limits, I could make brain tissue but if we're talking lots of it he'll have a job entraining it to be good at braining on his own, I can't make a brain spring into existence with usable data on it. They did experiments with split brain patients. If it's like forty neurons we're talking nasty bump on the head, not relearn English, but it could be forty now and a million if we make it mad?"

"There are defensive magics he could learn that would let him shield his mind from its influence, but it would take a rare talent to learn at his age."

"You're thinking of occlumency? I agree it would be extremely difficult, but if anyone could teach him it would be you."

"...this would be to prevent the 'a million if we make it mad' scenario?"

"Yes. And potentially to force it out of his mind entirely, which should let you remove it without damaging his brain."

"Can your magic determine how much of his brain it currently occupies? To a degree that would let you . . . operate . . . safely, and to determine if occlumency helps?"

"I can try - the 'surroundings' hack is doing some work but depending on how much exactly..." He conjures some conjuration. "...looking at some brain damage here already. He wouldn't die, but unless it's actively getting worse -" He checks a few more time slices.

It doesn't seem to be changing at all, though given that his head gets smaller the farther back you go that takes a bit of doing to be sure about.

"Well," says a perturbed McGonagall. "At least we know."

"I will arrange to instruct him in occlumency. I'll need to construct a suitable pretext for everyone else for our visits, and something to tell him about why he needs to learn."