Found at the bottom of the Royal Hive, only appears once after all five Menhir Rings have been destroyed on the Marescent Plateau by giving Bells to the Tumerok NPCs.
When killed, stops the olthoi swarms for Tesserae, however any currently spawned creatures will remain until killed or the landblock unloads.
IMPORTANT! Only the person that got the kill should loot her head, anyone else will not be able to get reward from it and will be unable to give it to the rightful person.
One of the few quest globals:
In the darkest depths of Marescent Plateau on far Marae Lassel, the party of the bold <Player> has slain the young queen of the island's Olthoi brood! As one, the Olthoi swarms recoil from her final burst of terror, and slowly begin to withdraw back into their hives.
Olthoi Queen's death is preceded by a sharp, stabbing pain!