Reference from tonight’s game discussion.
This ancient ring is made of ivory and carved to resemble a snarling cat’s face on one end. If the wearer ever drops to 0 hit points or below, the ring expends one of its charges to cast a heal spell upon her. The wearer can also expend a charge if she fails a saving throw, allowing her to treat the saving throw as a success. A ring of nine lives has 9 charges when created, but most are discovered with only 2d4 charges left.
CL 13th; Prerequisites: Forge Ring, heal, limited wish; Market Price: 70,000 gp; Cost to Create: 41,750 gp + 4,960 XP.
Source: Magic of Faerûn