a question about a bastard's finders rights.

To understand what I am about to write here, I need to first make a few things clear.

This post relates to the character from another post of mine; here's the post in question: https://www.reddit.com/r/AsoiafFanfiction/comments/1rixnj7/westeros_and_werebears/

and this one too for fun: https://www.reddit.com/r/AsoiafFanfiction/comments/1rk4o6w/westeros_and_werebears_2_electric_bogaloo/

and also related to this one: https://www.reddit.com/r/AsoiafFanfiction/comments/1rkmhki/dumb_crack_headcannon_teh_real_reason_giants_and/

And the actual useful info for this post is this:

Werebears (Gurahl)—Summary

Origin: Created by an ADHD shitposting outer god called "the First One" who deliberately broke the divine rule that creations cannot exceed their creator's power.

Power level: Extremely close to the First One (if the First One is 10, we're bears ≈ 9.9999). Ridiculously overpowered shapeshifters.

Physical traits: Freakishly tall and massively built (20-foot war form); thick as castle walls; scythe-like claws and dagger fangs that crush steel/stone.

Durability & healing: Virtually indestructible—nothing kills them except the First One recalling them (and they usually have to ask first). Wounds heal instantly, often before blood hits the ground; no scars.

Weaknesses: None conventional (no silver, no wolfsbane, etc.). The only real limit is apathy toward most things except family, naps, and food—if you threaten any of those, gruesome death follows.

Magic: Masters of all forms, especially healing, elemental, and necromancy. Magic is "idiot-proof" and consequence-free.

Can raise every corpse on the planet with one gesture.

True resurrection: Kill any living thing as a sacrifice → spit on (or touch) remains → target revives perfectly healthy, even from a puddle of fluid. A full body is not required. Embalmed bodies suffer temporary horrible purging.

Nature: Not a curse; a birthright gift. Includes both humans who turn into bears and bears who turn into humans (the latter rarely bother with human form).

Personality: Extremely powerful but laid-back; world conquest is easy, but they don't care. They are only fiercely protective of their small circle.

Stone Snow – Summary

Identity: Twin "bastard" brother of Jon Snow; raised by Ned Stark at Winterfell as another Stark bastard (only Ned knows his true nature).

Appearance: 7'11" (in a world where average height is ≤ 5 ft), a walking castle tower of muscle; dark-haired like the Starks.

Relationships:

Sansa & Arya’s favorite half-brother.

Arya loves riding on your shoulder, pretending she's a giant.

Deeply loyal to the Stark family (to the death).

Reveal moment: During the journey south, Joffrey bullies Arya → Stone casually manhandles the prince → Joffrey demands his head.

Stone rips his own head off and throws it at Joffrey ("Boo!"). His head turns to ash, and a new head instantly regrows.

Joffrey pisses himself; the royal party freaks out.

Role afterward: Becomes the Starks' ultimate living guardian/weapon while canon events roughly continue.

Protects the family with casual immortality, strength, magic, and resurrection ability.

News spreads rapidly → the entire continent knows about the "Werebear of Winterfell" / "Immortal Bastard."

Political impact: Makes House Stark terrifyingly attractive/unbeatable as an ally (or enemy). Tywin Lannister immediately schemes to bind Stone to the Lannister bloodline via marriage (most likely eyeing Myrcella) to secure werebear traits for future Lannister heirs.

In short: Werebears = Saitama-level broken werebears with god-tier healing, resurrection, and zero fucks to give.
Stone Snow is their representative in Westeros: a loyal, mostly chill 8-foot Stark tank who casually no-sells decapitation and now has every ambitious house drooling over his genes.

TLDR: Stone Snow is Ned's overpowered as shit bastard son and brother to Jon Snow, a 7'11" tall walking siege tower in a world where most people cap at best at 4'5". In this AU, everybody also craves to be taller and have magic, making Stone the object of envy and desire of everybody from the smallfolk to the highborn and even the people who live beyond the Narrow Sea, but he is fiercely loyal to House Stark and his family.

So, the meat and potatoes of the post are. Somehow, some way (ok, the reason does not matter; what matters is that he did it). Stone took a swim and swam all the way across the narrow sea to the ruins of Valyria.

When he came back, he returned bearing gifts: three chests as tall as him and thrice the girth, filled to the brim with gold; another chest filled with petrified dragon eggs; and, last but not least, Valyrian steel.

Not just a dagger or a sword, nope; he came back fully stacked. a full suit of armor with bear motifs and a bear helmet; a long two-handed sword almost as tall as him; a warhammer and a battle axe, also almost as tall as him; and a shield also made of Valyrian steel (how the hell all those things were fitted to his size he will never know, and for the sake of his sanity he does not want to know). Detail: The axe and the hammer are made completely of Valyrian steel: shaft, head, and blade.

Stone also found a lot of Lannister gold from the time they were still kings of the Rock and their ancestral sword, Brightroar.

As you can guess, that causes an uproar, like a huge uproar, and the northern lords are badgering Ned to take the Valyrian steel from Stone and melt it to make weapons for the loyal Stark banners.

Fair is fair; they are also suggesting that Stone be properly rewarded, and just to make sure, Stone's loyalty to House Stark is absolute; if Ned told him to do it, he would do it without question.

Regarding this, I have a few questions.

The dumb one is, can Ned demand that Stone, who is still a bastard, surrender the Valyrian steel he found?

The not-so-dumb one is, would Ned demand Stone surrender the Valyrian steel he found?

And third but not least is what would Ned do about Brightroar? Would he keep it or would he see it returned to the Lannisters?