Resembling a large, pale fire opal, this gem is actually a magically preserved eye from an ultroloth—one of the yugoloths’ secretive lords. When you hold the ultroloth’s eye up to one of your own eyes and look through it, you feel terrible pain, and you take 1d6 poison damage and 1d6 acid damage at the end of each of your turns in which you look through the eye. While looking through the eye, you are color-blind but have truesight out to a range of 120 feet.

Fiendish Insight. You also gain an additional benefit based on which eye you hold the ultroloth’s eye up to. (If you have more than two eyes, the DM rolls randomly to determine the effect.)

If the ultroloth’s eye is held to your left eye, you can use a bonus action to look at a creature of Intelligence 4 or greater. While doing so, you learn the name and appearance of the mortal being that creature most loves and respects.

If the ultroloth’s eye is held to your right eye, you can use a bonus action to look at a creature of Intelligence 4 or greater. While doing so, you learn the thing that creature most fears. If a creature you look at with either of these features has telepathy, it is aware of what you’re doing and can shield itself from your scrutiny with a successful DC 17 Wisdom saving throw.

Permanent Placement. While attuned to the ultroloth’s eye, you can gouge out your own eye and press the gem into the empty socket. You take 6d6 acid damage and 6d6 poison damage by doing so, but if you survive, the eye grafts itself into your head. A grafted eye gives you the permanent benefit of its features (depending on which eye socket it replaces) and does not deal damage when you use it. It no longer counts against the number of magic items you can attune to, and remains a part of you until you die.

Rumors speak of how a creature that implants one or more ultroloth’s eyes draws the attention of powerful ultroloths in Gehenna, which might seek out the creature that has stolen the power of their kind.

Notes: Appears in Dragon+ #22