Yes, the main villain is a Snowy Owl. And yes, all animals in the group Aves(all birds) can earn the ring. Yes, it is like a ring but for birds. Yes, the diamond part glows when the wearer decides to definitely mind control a creature. Also, the heroine can use mind-control powers but only on RANDOM EVIL BIRDS. So not on the snowy owl or any other important villains but on birds like guards but only if they don't seem to have a big impact on their life much.