Ring of the Octopus King

"A mermaid who fancied to sing, Roused lust in the Octopus King. Her squiggly suitor, Tried hard to woo her, But she couldn't wear all his rings."

A coral ring
+1 AC
+1 EV
+1 Str
+1 Int
+1 Dex
One extra effect (see below)

There are eight of these, each with one of eight extra effects: Hunger-, Wiz, rN+, rF+, rC+, SustAb, MP+9, and Regen.

Desirability

Obviously more desirable than their mundane counterparts, but many randart rings will be better, as the bonuses these rings provide are not all that great.