The Ring and the other races

[obloquy]

I would think if an Ent had gotten the Ring, I don't know they would have used it to bring back the Entwives? Or maybe, use it to seek out the Entwives, who knows.

How could the Ring be used to do this?

The Ring had a specific design: to dominate others, and to exalt its master. The Ring didn't do anything, outside of this. If a bearer did not understand this purpose, and tried to keep the Ring without using it to this specific end, he would be "destroyed" by the Ring and enslaved, like Smeagol, or, to lesser degrees, Bilbo and Frodo. If the bearer was aware of the Ring's power (its sole power, mind you) and tried to use it, I can see three possibilities: 1) he would be proven naive and have the same fate as the ignorant one; 2) he would be fooled into thinking he was achieving his ends, only to be betrayed by the Ring; 3) the bearer would utterly break Sauron's imbued power/spirit and become the Ring's new master. Under these last circumstances, it's hard to say what would happen. Could the bearer enslave Sauron's power to use as his own? Or would the Ring just "die" with Sauron and become useless? I would guess the latter, and Tolkien says in Letters that an individual successfully claiming the Ring would be tantamount, as far as Sauron is concerned, to destroying it: that is, Sauron would be reduced to impotence. He doesn't say whether the Ring's power could persist even after Sauron's destruction, but I doubt it.

I doubt a dragon or an eagle would care much for the Ring. Why would a dragon need it? What would it do with it? The Ring is unlikely to make its way back to Sauron sitting in a dragon's hoard, so if it found itself there, it probably wouldn't stick around long. Eagles don't seem to have much to do with any world but their own, and I would be surprised if they cared enough for kingdoms and riches and subjects for the Ring to appeal to them. Kinda like Bombadil.