Third EyeEquipment 19
Source Pathfinder Core Rulebook
Price 40,000 gp
Weight negligible
When invested, this ornate crown and its incandescent gemstone meld into your head and take the form of a tattoo. This grants you otherworldly sight and allows you to read auras. No one but you can manipulate the third eye while it's invested by you. Your heightened senses and ability to sense emotional auras grant you a +3 item bonus to Perception checks.
You continuously see magic auras, as a 9th-level Detect Magic spell, except you see the location of all auras within 30 feet, not just the strongest. If you use a Seek action to study a creature you can see, you can perceive an aura that conveys knowledge of that creature's health, including all conditions and afflictions it has and an approximate percentage of its remaining Hit Points.
Activate 
envision, command
Frequency once per day
Effect You gain the effects of an 8th-level True Seeing spell.
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.
DivinationThe divination school of magic typically involves obtaining or transferring information, or predicting events.
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).
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.