Amulet of Inoculation

Your Constitution score is 19 while you wear this amulet. It has no effect on you if your Constitution is already 19 or higher without it.

Curse. This amulet is cursed, fact that is revealed only when an identify spell is cast on the amulet or you attune to it. Attuning to the armor curses you until you are targeted by the remove curse spell or similar magic; removing the amulet fails to end the curse. While cursed, you have vulnerability to poison, acid, and necrotic damage. You roll with disadvantage for checks against poison and disease.

Notes: Set: Constitution Score, Vulnerability: Acid, Vulnerability: Poison, Vulnerability: Necrotic, Buff, Cursed, Jewelry