Ring of True Regeneration

This artifact of epic power was gifted by Corellon Larethian to one of his most powerful clerics. While attuned to this item, you regenerate at the rate of 1 hit point per round. If you are reduced to negative hit points equal to your level, or if the attuned creature does not have a level, it's CR.  Also, you can use this object once per day to cast the Cure Wounds spell as a bonus action. 

Destroying the Ring: The ring must be soaked in Potion of Poison for a month in the Demonweb Pits, then subjected to a 6th level or above Inflict Wounds spell. 

Notes: Cure wounds 1/day, humanoid or monster, Healing, Jewelry