Way Of The Wicked - The Fall of Talingarde
Eye of Withering
The Third Eye of Vetra-Kali
This jewel at first appears to be nothing more than an exquisite emerald worth at least 20,000 gp. Only if the jewel is steeped in the blood of a sentient creature does it reveal it’s true nature. The Withering Eye was the magical focus used to first summon Vetra-Kali from the lower planes to the prime material. It is thus attuned to Vetra-Kali and a powerful channel for daemonic energy. The Withering Eye when placed in the statue of Vetra-Kali desecrates (as ths epll except it affects both undead and daemons) the entire Horn of Abaddon. The DC to resist negative channeled energy within this area gains a +6 profane bonus. Every undead or daemonic creature gains a +2 profane bonus on all attack roll, damage roll, and saving throw. An undead or daemonic creature created within or summoned into such an area gains +2 hit points per HD. Furthermore, anyone who casts animate dead within this area may create as many as double the normal amount of undead. The Eye is also a critical component of the ritual to destroy the Silver Seal and return Vetra-Kali to the prime material plane.
If all three of the Eyes of Vetra-Kali are united in the statue of Vetra-Kali in the Sanctum, then the Withering Eye not only desecrates the Horn but also grants all daemons within fast healing 1.