A thin, dark red ring carved out of pure ruby. If attuned to it, when you get healed with magic after losing at least half of your full health, you regain a spent spell slot from each level available to you. In addition to that, you will be able to cast the Finger of Death spell. The target must succeed a DC 20 CON saving throw. After casting this spell with the ring, you must succeed a DC 20 CHA saving throw in order to not be taken over by bloodlust.

Notes: To attune to the item, you must wear it while going to 0 HP