Talk:Ring Forging/@comment-32059653-20200202011503

The chief power (of all the rings alike) was the prevention or slowing of decay (i.e. 'change' viewed as a regrettable thing), the preservation of what is desired or loved, or its semblance – this is more or less an Elvish motive. But also they enhanced the natural powers of a possessor – thus approaching 'magic', a motive easily corruptible into evil, a lust for domination. And finally they had other powers, more directly derived from Sauron ('the Necromancer': so he is called as he casts a fleeting shadow and presage on the pages of The Hobbit): such as rendering invisible the material body, and making things of the invisible world visible.

The Elves of Eregion made Three supremely beautiful and powerful rings, almost solely of their own imagination, and directed to the preservation of beauty: they did not confer invisibility. But secretly in the subterranean Fire, in his own Black Land, Sauron made One Ring, the Ruling Ring that contained the powers of all the others, and controlled them, so that its wearer could see the thoughts of all those that used the lesser rings, could govern all that they did, and in the end could utterly enslave them.

-JRR Tolkien, Letter to Milton Waldman