Heartstone

A heartstone was a specific type of gemstone associated with the malevolent night hags. They held within them several different magical properties.

Description
They each appeared as a glossy black gem.

Night hags were each required to craft their own heartstone, a process that took 30 days.

Powers
When a night hag had her heartstone in her possession, she was could become ethereal at will. Additionally, mere contact with a heartstone would cure an individual of any disease with which they were afflicted.

Notable Owners

 * Mad Maggie, the night hag leader of the Knucklebones gang in Avernus.
 * Widow Groat, one of the Sewn Sisters that helped craft the Soulmonger for the lich Acererak.
 * Wormriddle, denizen of Dweomercore within Undermountain.

Appearances

 * Adventures
 * Tomb of Annihilation • Waterdeep: Dungeon of the Mad Mage • Baldur's Gate: Descent into Avernus
 * Organized Play & Licensed Adventures
 * Rage of Demons (It's All in the Blood) • Curse of Strahd (Reclamation of Phlan) • Avernus Rising (Faces of Fortune • Losing Fai • The Breath of Life • Fang and Claw)