There appears to be inconsistencies in the lookup of items carrying a certain spell/effect. I noticed this looking for items with Conservation of Xegony:
http://lucy.allakhazam.com/itemswitheffect.html?id=3539
Cloak of Nightmarish Visions Armor
Dark Tunic of the Enslavers Armor
Drape of the Merciless Slaver Armor
Ebony Ring of the Slave Masters Armor
Ikaav-Scale Collar Armor
Shawl of the Void Armor
Tunat'Muram's Chestplate of Agony Armor
Which does not list, at least:
Talisman of the Elements http://lucy.allakhazam.com/item.html?id=7769
You may wish to look into this.
Itchy