Not Available in Any Stores
From RoR Wiki
Not Available in Any Stores is a Tome of Knowledge Bestiary entry for Giant Bat.
Instructions: Order & Destruction
Kill Deathwing (a level 40 Champion Giant Bat) in the Caverns of Terror at 44.6k 3.5k in the Chaos Wastes. He can be found in the room furthest back. He will drop a Pocket Item 'Deathwing's Fangs'. Equip it will trigger the unlock.
Rewards
- Jewel Item : Hapless Ha'penny
- XP: 1800