Mage Slayer Item Property
This super slayer type was one of nine new super slayer types added with Mondain's Legacy (Bat, Bear, Beetle, Bird, Bovine, Flame, Ice, Mage, and Vermin). Originally, these slayer types were only found on talismans, but they have since also become available on spellbooks and on certain Artifacts. These nine super slayer types cannot be imbued.
Mage Slayer Items
Mobs vulnerable to Mage Slayer
These mobs will take double damage while you have the Mage slayer equipped. If the slayer property is on a talisman, it will not have an effect on the damage caused by spells. For bards, success chance is increased by 20% when an Mage slayer instrument is used (at least theoretically; none currently exist).