Sondra is making a FACE but this argument does make sense! 

"Mandos might be more likely to send Leareth back, though, if he does die? Because, er, we clearly really badly need him. ...Also, is there any reason we can't just ask Mandos before we try it?" 

"I suppose you could try. We need to make a decision on this quickly, though - we are wasting time -" 

Vanyel sighs. Closes his eyes, dragging a hand briefly over his face. He just got given a new body, he has NO EXCUSE to be suddenly feeling tired. It's just...a lot. 

"Fëanor? What do you think?" 

"I'll ask the Earth humans," Fëanor says in Valdemaran.

Then in English to Tony and Bruce—"We are looking for a volunteer for our second attempt at time travel. I don't expect it to be harmful to humans, but I understand why you'd be reluctant and I wouldn't ask, except that most of our willing volunteers have magical soulbonds that would hurt their partners if they died."

"It is probably not wise to do anything that might harm me—I become—quite destructive when provoked. I'm not sure if this would be the relevant sort of harm, and I'm having trouble with that thing anyway, but—still not wise."

(This is quite confusing to Fëanor, so he skims Bruce's unguarded surface thoughts for context, and gods that is horrifying.)

"I'll do it if death god promises to send me back."

TO RETURN A MORTAL FROM BEYOND DEATH IS AN EXTRAORDINARY THING. I AM DOING IT ONLY FOR VICTIMS OF AN ATTACK WHICH WAS EQUALLY EXTRAORDINARY. IF YOU INJURE YOURSELF IN THE PURSUIT OF TIME TRAVEL THAT IS NOT MY PROBLEM.

Fëanor looks back at Leareth.

"Strange saw it working in one of the futures, no? I cannot see why it would work for an Earth human and not a Velgarth human, so - I will volunteer." 

It's stupid to be as stressed as he is about this, but Vanyel is so stressed! 

Fëanor shows Leareth how to send himself five minutes into the future. Five minutes later he emerges, just fine, having experienced almost no time at all.

(It's even more confusing to Leareth's mage-senses than watching Calanáro's transit as an observer, although his trip is too brief to really get a good look at what's happening.)

Alright, says Fëanor, using osanwë because his audience has no common language, let's figure out who's going back to Earth. Also, if anyone would like to go back to Valdemar it's possible, but not certain, that we could arrange that.

(Fëanor himself is going back to Earth, though the time travel problem will limit him to a support role.)

I want to, he tells Elë, privately, but now that both of you are alive again perhaps Tyelpë had a point.

Oh, I'm going too. Obviously we can't do the time travel part anyway, but I'm pretty sure at this point that Endórë isn't any more dangerous than here, and I want to see what they've been up to.

(She has been, during Fëanor's conversations with the Valdemarans and the time travel trial, checking their math. It looks pretty good, but she's definitely going to poke some fun at Calanáro for using literally all of Formenos' computers to brute-force a problem whose solution she'd been taught when she was thirty.)

(Tony and Bruce are, obviously, going back.)

Vanyel spends the entire five minute wait pacing frantically, and then feels like an idiot about this once Leareth turns out to be, obviously, fine. 

"...I guess we should ask about going back, if it's possible we can." 

Randi squeezes Shavri's hand again. He's...sort of finding himself hoping it won't turn out to be possible? Which is weird, and also obviously something he's going to ignore, but - well, it's not like he ever liked being King. 

"- I would like to see the god-domain that would allow me to see what is happening on Velgarth, if it is not too much of a delay." 

"It's—somewhat on the way."

He starts packing up their equipment to be loaded onto the ship, and as he does so—

Maitimo?

Maitimo is sitting in the library with Macalaurë, reading a horribly polemical Elvish-written history of Endórë in the Fifth Age, and comparing it with his brother's memories of the same time.

Father?

We are getting ready to go back. What did you learn from Leareth?

He is very difficult to read; I would doubt that I got anything from him that he didn't want me to have. I have seen no indication he isn't one of the Secondborn, but I suspect him to be much older than he looks. I would doubt that he is overly fond of gods. I would not assume he had any reason for coming here other than to undo Thanos' mass murder, but if he ends up with a chance to get the Infinity Stones I doubt he will go home quietly either. He is—intensely loyal—to someone or something, to the point of continuing to work at his goals through great suffering, but I cannot tell to whom or what.

Is he someone we can work with?