From the Olthoi Hunter Kill Tasks quest introduced in the A Change in Tactics event.

Pest Control Plaque
File:Pest Control Plaque icon.JPG Pest Control Plaque
The owner of this plaque is a certified "Pest Control"!
Value 0
Burden 5
Special Properties Attuned, Bonded,Ivoryable
Related Quests Olthoi Hunter Kill Tasks
Obtained By Received in exchange for killing 20 Olthoi Drones for the Olthoi Hunter outside Arwic