"It's not your war effort against the Enemy that has me concerned. Well, I suppose there might be a problem if it turns out I can cure orcs and they resent attacks on their uncured relatives, but that's rather farfetched. But however well I have preached charity to your cousins, they needed it preached for a reason, their resentment was not random, and I do not know what further provocations might be imagined in the millennia to come."
Melkor arranged evidence - false evidence - that my uncle was trying to persuade the King to disown my father, and evidence that my father was trying to persuade the King to exile his second wife and her children. They both disbelieved it. They took six hundred years of careful lies on Melkor's part to start mistrusting each other. It was another two hundred after that before it devolved to the point where my uncle demanded before the full court of Tirion that the King disinherit my father, and my father responded by pulling a sword on him.
It wouldn't have happened otherwise. It is not organically going to happen again."
"I don't think so, but they want me to train them in combat and I've been reluctant so if they meant to they'd have every incentive to mislead me. Also, they want some items currently in your possession and I don't know how many of them I can retrieve by offering to translate a dictionary into Asgardian."
"I haven't even listed the things. For all you know they've cooked up a desire to possess a Silmaril."
"And you think you can accomplish this for me even if Fëanor is once again awake most of each day and may conceive some objection, even if I come here next week with Maitimo in tow...?"
"I am," she says, "very tempted. Do you mind if I go and convey this idea to your cousins in case they have awful things to say about your honesty or something like that?"
"I am very sorry about that. Do you also want me to walk out past the walls to leave?"
And she vanishes-changes-flies.
She alights near Findekáno. "Maglor," she says, "offers me his word that you will have all your stolen possessions if I heal his father. Your opinion?"
If he said that, he means it. Is that your question?"
"I was already tempted to keep Fëanor's oath in force and am asking if there are hidden pitfalls I would not see now that this wrinkle has been added. ...And Maitimo is not a factor."
"The Enemy has him. Or had him; they are hoping he is dead."