Certain high-level monsters are covetous, in that they desire one of the unique items or your quest artifact. Some covetous monsters are able to steal the item they covet from your inventory. The quest artifacts of other roles are immune to this theft, as is yours if it is stashed in a bag. There is no defence against this theft for items in your main inventory; this is especially troublesome if your only source of magic resistance is your quest artifact. Covetous monsters cannot be tamed by any means. The Wizard and all quest nemeses cannot even be pacified.