HeartstoneEquipment 9
Source Pathfinder Bestiary
Price 600 gp
Weight negligible
This gemstone grants its wearer a +2 item bonus to saving throws.
Each heartstone is powered by the spirit of a specific night hag. If it's separated from her for 24 hours (or she's been dead for 24 hours), it becomes a nonmagical gemstone. A heartstone allows the hag to use additional occult innate spells: Ethereal Jaunt (9th level) and Bind Soul at will, and Shadow Blast twice per day.
Activate 
command
Requirements You must be touching the heartstone.
Effect The heartstone attempts to counteract one disease affecting you (counteract level 5, counteract modifier +18).
Craft Requirements You must be a night hag.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AbjurationEffects and magic items with this trait are associated with the abjuration school of magic, typically involving protection or wards.
InvestedA character can wear only 10 magical items that have the invested trait. None of the magical effects of the item apply if the character hasn't invested it, nor can it be activated, though the character still gains any normal benefits from wearing the physical item (like a hat keeping rain off their head).
OccultThis magic comes from the occult tradition, calling upon bizarre and ephemeral mysteries. Anything with this trait is magical.