Pearl of Putrescence
#wondrous-item #uncommon (requires attunement by a spellcaster)
This flawless black pearl appears to be a pearl of power to anyone who tries to identify it, and can be used as one.
Curse. This pearl is cursed. Attuning to it curses you until you are targeted by the remove curse spell or similar magic. Removing the pearl fails to end the curse on you. Until the curse is broken, you don't regain spell slots when you finish a short or long rest.