Source Gods and Magic
Aura faint necromancy; CL 3rd
This finger-length crystal is a pale opaque pink color when worn by a living creature, but slowly changes to a translucent deep violet when carried by the undead.
You can eat spoiled food and drink spoiled liquid as if it were fresh and wholesome, tasting as good as it did before it spoiled. Any person with the Profession (cook) skill can use the crystal to season a meal with the flavor of salt, sugar, cinnamon, ginger, or pepper (or the equivalent spices for the undead palate — fear’s breath, nightfog, bloodroot, thileu bark, or hatefinger).
If Urgathoa is your patron, once per day you may use death knell. Both cure and inflict spells heal you, whether you are living or undead; the crystal flares with black or white energy when it converts this energy into a form that does not harm you. The crystal does not affect any other uses of positive or negative energy, just cure and inflict spells (or effects that duplicate these spells).