Bat 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.
Bat Slayer Items
Mobs vulnerable to Bat Slayer
These mobs will take double dmage while you have the Bat 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 Bat slayer instrument is used (at least theoretically; none currently exist).