This together with 3 Hoodlum's Symbol of Dust is used in the quest from Digmaster Duggert the 5th and last of the slaves who are held prison in Droga.
Look up the "Free the Drogan slaves" in quest section if you want to know more.
Reward is:
Antique Ring of Truth
MAGIC ITEM LORE ITEM NO DROP
Slot: FINGERS
AC: 8
STR: +6 CHA: +10 AGI: +6 HP: +75
MANA: +75 SV FIRE: +9 SV COLD: +9 SV MAGIC: +9
Recommended level of 55.
Effect: Regeneration I (Worn)
WT: 0.5 Size: TINY
Class: ALL
Race: ALL