The Barrada of Sundara, a water-dwelling subspecies of orcs detailed in Species of Sundara: Orcs (5E), have teeth that grow back and they remove and use these teeth to make charms that are enchanted by the orc’s shamans which are then gifted to others. When worn, these charms allow water breathing for the wearer.

Barradan Tooth Charm

Wondrous item, uncommon

A Barradan orc’s tooth that is mounted on a necklace. When worn and activated, the charm allows the wearer to breathe underwater as water breathing for 10 minutes at the cost of one charge. The charm has only 5 charges when fully charged, and once all are used, the tooth crumbles to dust.