Ring of Symbiosis

Ring, Rare (Requires Attunement)

Your blood sustains the ring and together you thrive. By allowing the ring to drain some of your life force, you can gain a temporary boost to your abilities.

After you make an attack roll, ability check, or saving throw, but before the GM tells you whether the roll succeeds or fails, you can use your reaction to roll a d6 and add it to the roll. You then lose a number of hit points equal to the roll of the d6. Once you have used this feature, you must finish a short or long rest before you do so again.

Additionally, if you are reduced to 0 hit points, but do not die outright, on a day in which you have used the ring at least once, the ring restores some of your life force and you instead drop to 1 hit point. If you are reduced to 0 hit points on a day in which you have not used the ring, the ring instead drains your remaining life force and you die immediately.

If the ring goes three days without use, it falls off your finger and becomes lost. You can attempt an Intelligence check (DC = 10 + the number of days it has been missing) to recall the general location you had the ring last, but when you return you may find that it has been claimed by a more willing host and is gone forever.

ring of heavenly protection ring of dark glass ring of ring of symbiosis

Solomon

Azrael's Guide to the Apocalypse, printed page 173.