Grim RingEquipment 5
Source Pathfinder Book of the Dead
Price 150 gp
Weight negligible
This golden ring is sculpted with the visage of a grinning skull on the side. While wearing the ring, you can attempt to detect the presence of undead creatures as an exploration activity. This reveals the presence or absence of undead in the area, but it doesn't pinpoint their locations. This ring can't detect undead whose appearance is masked by any illusion spell that is 2nd level or higher. If an undead is hiding or disguised, the GM rolls a secret Perception check for you against the undead's Stealth or Deception DC, as appropriate, with a +2 item bonus to your check.
Activate 
envision (positive)
Frequency once per day
Trigger You gain the drained condition from an undead creature
Effect Reduce the value of the drained condition you gain by 1, and the undead that caused the condition takes 2d6 positive damage.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
DetectionEffects with this trait attempt to determine the presence or location of a person, object, or aura.
DivinationThe divination school of magic typically involves obtaining or transferring information, or predicting events.
DivineThis magic comes from the divine tradition, drawing power from deities or similar sources. Anything with this trait is magical.
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).