Tellectus

Tellectus was a city founded by a small colony of illithids from Oryndoll in the Upperdark near Beregost.

After a group of adventurers launched a devastating raid upon the city, it was abandoned by the illithids and fell into ruins long before the mid–14th century DR.

However, their mozgriken servitors still lived in the ruins, abandoned by the illithids and not wanted among their svirfneblin ancestors. Their numbers somehow grew slowly, and a community of mongrelmen grew underneath them as thralls.