"I am hoping they would rather fourteen billion innocent people from my home planet who are slated for a thoroughly mediocre afterlife if they die not be casualties of inadequately constrained contact."

"Well, those people aren't Kinslayers, are they? I am sure they won't be Doomed."

"But they wouldn't know about the Doom, and they've never heard of the Valar, so they wouldn't necessarily know to keep their distance from the Doomed people."

"Ah. It is wise to petition the Valar for aid in managing that situation."

"That's what I thought." Walk walk. At least Elves have a better design sense to apply to the Way Too Many Gems school of architecture.

They do! It's pretty tasteful totally excessive gems. And after a while the path winds around to the place he saw from the air where the mountain opens up to rise on both sides of the ring where the thrones of the Valar are. The thrones are currently empty. 

"I'm in a little bit of a hurry," Cam remarks to his interlocutor.

"Oh, go ahead and step into the Máhanaxar and kneel and call on them and they'll be there."

Kneeling. Delightful. Fuckers. In Cam goes. Plop. Annoyed tail-lashing. "Excuse me, Valar?" he says.

And the air pressure goes up, abruptly, and there's a feeling like static electricity on his skin. 

...geez, they're theatrical. "I have a petition to bring before you on behalf of five distant worlds."

"Welcome, stranger. We will hear your petition."

"Thank you. I am a resident of a world - an entire spatially infinite dimension, not a planet - called Hell. It is connected to worlds called Heaven, Fairyland, and Limbo, and also a mortal realm more similar to this one. People in Hell, Heaven, and Fairyland, called 'daeva', can be summoned to the mortal realm. Recently a child here managed to accidentally summon me. It is also possible for mortals to become daeva. I am deeply concerned that any interaction between the powers of daeva and the Doom could be disastrous for, particularly, the fourteen billion mortals of my home, who have never heard of you, will not know to be cautious, and, having no backups, mostly go to Limbo when they die. Limbo isn't a very nice place. I would like to ask that the scope of the Doom be quarantined and apply to no events outside this dimension."

"We assent to this, on the condition that no residents natively of this dimension travel to yours. We will make such travel impossible. We have also made the summoning of beings from your world to this one impossible."

...this is a deeply inadequate response and Cam has no idea if pushing his luck will somehow make them even more aggressively inadequate. "I am new to the world and do not know how your impossibilities work. I would not like to have to fear for the possibility that the Doom will escape if some person should do so in a fashion you do not anticipate. While of course controlling immigration and emigration is your prerogative I would rest easier on behalf of those billions of Limbo-destined souls if their safety from Doom were unconditional regardless of how the natives of this world behave. I have no way to warn them, not even if I go home."

"They certainly will not be subject to the Doom; it lies only on the House of Feanor and those who follow them. If a Doomed person reaches your dimension they will not cease being Doomed. Though our powers should not carry out their working in your dimensions, the distorted minds and passions of those so Doomed will remain. And their Doomed choices cannot be sealed off from affecting others. We can ensure that no one leaves this dimension for yours. That ensures the safety of yours. It is the only way to ensure the safety of yours."

"I am concerned that someone from here may reach my world and someone else may do something that constitutes 'following' them," Cam explains.

"The Doom shall be restricted to the Noldor and passed down by blood rather than allegiance."

"Thank you. - I am not familiar with how your proclamations work, is that pan-universal?"

"It is. Everywhere our powers stretch at all and the Doom is therefore relevant, this is now true."

Okay cool that is merely as inadequate as they were trying to be in the first place. "Thank you very much."

"Go with our blessing, stranger."

"Thank you."

And Cam gets up and goes out along the Too Many Gems Path.

And passes a few happy agreeable petitioners or observers, and returns to find an interested crowd around his spaceship. 

"Hullo," he says when he lands by his ship.