Not how Mandos works, sadly.

In what way? There's a lot of magic to throw around, maybe some of it could bridge the gap.

Elven spirits without bodies cannot even do osanwe, except with Maiar and Valar, because their osanwe works differently.

Well, Elspeth works differently. The communicative telepath back in Aurum works differently.

Well, they're welcome to come down to this random place that looks like a flat grey space and see if in so doing she can communicate with Fëanáro.

Inconveniently Elspeth will not be able to hear replies; will Mandos inform her if her message is received?

Fëanáro doesn't like Mandos reading his mind and keeps telling him to fuck off, so Mandos won't know either.

Well, it's very nice of Mandos to fuck off when told, at least. Elspeth will go get Dwi.

She goes and gets Dwi and Dwi says, [Testing.]

There's a response in an unfamiliar language. It sounds confused.

When Dwi reports this result to Elspeth (it means "who or what is this?"), Elspeth takes over the sending half of things. Hello. I'm Elspeth. I can only send, not receive, so Dwi who just spoke to you is the only way to confirm if I'm getting through. He doesn't speak Quenya but I do and he can reproduce whatever you say to him.

[What is he speaking? Who are you?]

I don't actually know what language he used, he just needed to say something to establish contact. I'm from a neighboring universe; we have different magic there, personalized powers that only some people get, and mine is "telling the truth" but it's expanded from there.

[What's this about?] He sounds wary and absurdly happy, all at once.

There's a bunch of worlds, and this one is part of a pattern that has recurred several times but it's different from the others; specifically most people seem more antisocial than the other worlds' versions of them. We're thinking of mostly quarantining it, but you'd be hard to quarantine so it's separately important to see if you're antisocial enough to be unsafe.

[Can you get me out of Mandos?]

I can't personally but people who listen to me can.

[If I can get out of here I'll fix whatever's wrong with the world.]

We don't even know what that is.

[That just means it'll take me a little longer.]

I can pass on the offer but I'm not sure everyone will believe that this is the most significant thing you'd do if reembodied on your say-so.

[Are there more significant things to be doing?]

That seems like it would depend on how you rank them. Also it might happen that you found it expedient to do something antisocial in the course of working on the problem.

['antisocial' is pretty vague. I'm sure I'll do something you don't approve of, not being a puppet of yours.]

I can go see if one of your alts is available or at least someone who knows them is available, they might have a better idea of what to look for.

[You are still being annoyingly vague. What do you want fixed and what are your conditions?]