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.