"It's pretty rude to tell people to not use their magic when it isn't affecting you." Fenris says, literally hovering.

He is also: completely naked.

"Snooping around in people's homes is ruder, though. To what I owe the pleasure to have your presence?"

"You're a pretty interesting guy, thought I should have a look at your..."

He coughs, averting his gaze.

"At your lair."

Fenris smirks when Stiles averts his gaze and makes no movement to cover himself. "Of course, my lair. Found anything interesting? I'm happy to answer any questions but... I'll show you mine if you show me yours."

"I definitely think you should consider that Derek's uncle was probably a werewolf and they're all kind of rage machines. He might only be under control now because his body is still frail."

"That falls under 'unknown personality'. I suppose it might also fall under 'unknown interaction with lycanthropy'. Do you know anything about his uncle?"

"No, it just seems good to be prepared."

"Well, obviously. Or people could do all kind of things like sneak around and uncover your secrets. Of course, we are going to talk about the immortality being shareable with you and Scott today, because we wanted your opinion on sharing it with Derek's uncle and we've been considering handing it to you for emergencies."

"Sharing immortality sounds good all around. Could I get you to give it to my dad first?"

"Well, first, I should elaborate how my immortality works. The most relevant feature is that it comes with skymagery, which means that whoever becomes my kind of immortal also get wings and randomly selected weather powers."

"Sure. Explains the everything. Never mind, then. I probably won't take it either, not until we can reveal you to everyone."

"Well, it comes in the form of magical spring water, that you could carry around and drink during emergencies or give to others during emergencies. Then you would be connected to the respective fountain and every time your body dies the fountain would make you one after a week. I'm trying to improve upon it, but I can only make about one spring per month."

"Right, and Scot and my dad should get it first, and Scott won't take it before his mom gets it...so I'll wait."

"We have five immortalities to share - brought some from our home universe. So there is enough for the four of you plus Derek's uncle, but we would rather not to use them all at once."

"Just our parents, then, and Derek's uncle. We're still young, not as risky for us."

Fenris nods. "It would be a good idea to talk with your parents before we suddenly give them wings. I suppose Derek's uncle - should've asked his name - can wait for a bit if his condition is stable and non-painful, but if it isn't either of those two things then he would be priority."

"I think it's stable? Seems like it's been a few years. But it could be painful." 

"Yeah. There might be some medical solution, but... have we explained the time distortion?"

"I don't think so...something to do with how you got here?" 

"Not really, time is asynchronous between the different universes and that is why there is five of us and not the ten that were supposed to come. Our home universe is stuck fractions of seconds after we left and the other five simply haven't exited it yet. Among the group that was coming it included an extreme medical genius and someone that could provide magical healing. But for all we know they can arrive anywhere between the next minute or in the next millenium. I was wondering how Derek would react to the proposal we could hold out a bit longer instead of just turning his uncle into an immortal. Oh, and Felix can summon information from the other universes so if any develop a miracle of medicine we could use that too."

"How long could it be stuck like that from our perspective? Summoning information might be our best bet."

Fenris gives him a helplessly shrug. "So far the progress between all three observed universes looks pretty much random with our original one being consistently slower but at a rate that fluctuates between one to six million times slower than here, maybe it is be stuck like that, maybe next time we check it will a thousand years."

"You said you have five immortality springs?" 

"Yes and I can make one more per month, a bit longer if I spend time developing new aspects to improve it, like the ability to shift away the wings, which I might not be able to do."

"So you can get a lot of people, if they're willing to hide?"

"For certain definitions of 'a lot', yes. Only twelve to thirteen people per year, more if I spend a lot of time sleeping. I do have reason to believe the immortality is hereditary so at least their future children can be immortal."