Antius Blackmoor tells you, "Since joining the High Queen's council I have served as chief diplomat and scout. In the last few weeks we have found large concentrations of olthoi at several focal points across Dereth. Most of these focal points have already been eliminated by other hunters; their efforts will not be forgotten, or go without reward. There are still five locations that have a higher concentration of olthoi than we have ever seen before."
Antius Blackmoor tells you, "We know that vibrations attract the olthoi. Preliminary reports about previously dismantled nests indicated a powerful humming noise emanating from the structure. We believe that the olthoi have been digging from the north and south for quite some time, having used the chaos that has been brewing amongst the lugian and tumerok raids, and heightened presence of Aerbax's virindi, as a cover for their expansion. This shows a heightened intelligence akin to what they exhibited upon our first arrival to Auberean."
Antius Blackmoor tells you, "Additionally, I am certain that smell has something to do with their movements. I've visited the former sites of the nests and found that each had a peculiar scent about it. Perhaps the potency of the scent attracts the different Matrons and Queens, who in turn control the movements and actions of the horde. I cannot fathom the level of intelligence necessary for organizing so many minds at once, but I am certain that such intelligence must have a weakness."
Antius Blackmoor tells you, "We have Asheron and Nuhmudira, despite their differences, working on finding and exploiting that weakness. Nuhmudira is collecting the glands from the olthoi queens, while Asheron attempts to duplicate the process that he used for the original poison. There is still one concern however. We are not as advanced as the Empyrean and so our attempts at harvesting the glands will likely be clumsy. For that very reason, I have found the location of five other massive concentrations of olthoi. We are presuming that these areas are lead by a queen."
Antius Blackmoor tells you, "I have detailed the locations in this book."
Antius Blackmoor gives you Olthoi Queens: Locations and Findings.
Antius Blackmoor tells you, "When you find the queens, kill them and harvest the glands. Return those to Nuhmudira. I will be departing with Elysa at some point to find the location of the final one or two nests. Good Luck."