While wearing this ring, you can hear a holy entity that tells you it is a Deva trapped within.  If an evil character wears the ring they must roll a d20. On a 10 or lower the finger is cleanly severed at the base of the ring.

This ring has 3 charges and regains all charges at dawn.

After attuning to this ring, you can cast daylight at will.

Healing Light. You can expend one charge to touch a creature to impart magical healing. The target magically regains 4d8 + 2 hit points and is freed from any curse, disease, poison, blindness, or deafness. 

Cleansing Light. Your attacks do an extra 2d8 radiant damage.

Transcendent Light. While wearing this ring, you can spend a short or long rest praying to either the gods of the sun or the moon. Depending on which gods you prayed to, different effects are granted for you for the next 24 hours or until you use this ability again.

Sun grants angelic wings made of pure light. These wings bestow you with a 90 foot fly speed. If you already have wings, this effect augments your current wings.

Moon gives you a resistance to magical and non-magical slashing damage as your skin faintly glows pail light.

Illusory Light. You can use the Deva's change shape ability to change into any creature with a CR equal to or lower than your level. This form is purely an illusion however it tricks all senses including touch, except ones that can see through illusions like truesight. Your hit points, stats and abilities remain the same as your base form.

The Deva can potentially be released from the ring. Doing so would require some form of quest or holy ritual. A DM might also decide that high level rare components of spells are required. Upon being released from the ring, the Deva thanks the party and those who freed it are granted free passage into one of the good aligned planes.

Notes: Bonus: Speed (Flying), Resistance: Slashing, non-evil creature, Deception, Jewelry