Ancestral Origin: Ancient surface dwarves
Primary Environment: Underdark
Game Rules: Use standard Duergar ancestry rules
The Duergar are a dwarven people descended from populations that migrated from the surface into the Underdark in antiquity. Their separation was not the result of one universally remembered event. Different ancestral communities may have gone below in search of mineral wealth, refuge, defensible territory, new settlements, or escape from conflicts that have long since passed out of reliable history.
After centuries and millennia below the Spatial Break, these populations became distinct from their surface dwarven relatives. The traits represented by standard Duergar game rules are understood in Kor Sirok as part of that long adaptation to the deep world and its unusual magical and geological conditions rather than as the consequence of a single divine curse or common ancestral catastrophe.
Communities
Duergar do not belong to a single kingdom, culture, or political tradition. Their settlements participate in the same fragmented geography that shapes other Underdark peoples: cities, strongholds, mines, clan territories, and smaller communities can remain separated from one another for generations by dangerous routes. Two Duergar settlements may therefore share ancestry while differing substantially in government, religion, law, language, and their relationships with outsiders.
The risks of subterranean travel generally encourage more isolationist attitudes than are common in many surface societies. Reliable tunnels, controlled entrances, defensible chambers, water sources, and known routes can be matters of survival, while opening a new passage can expose a settlement to predators or hostile neighbors as easily as it creates an opportunity for trade. Caution toward strangers and close control of strategic routes are therefore common responses to the environment rather than innate Duergar characteristics.
Mining, stonework, engineering, and the control of deep resources are important to many Duergar communities for the same practical reasons they matter to other subterranean societies. These occupations should not be treated as universal cultural obligations. A Duergar raised in a port, mercenary company, scholarly community, surface city, or mixed settlement may have little connection to the traditions of an isolated deep stronghold.
Relations with Surface Dwarves
Duergar and surface dwarves generally recognize that they are related peoples, but ancient common ancestry does not imply shared culture or political loyalty. Long isolation has created different historical memories, institutions, and expectations, and communities on either side of the Spatial Break may know surprisingly little about one another.
Relations range from trade and kinship to suspicion, rivalry, and open conflict. Surface dwarves may value access to deep mines and routes, while Duergar settlements can depend upon surface timber, food, livestock, medicines, or manufactured goods difficult to obtain below. In other regions, generations may pass without meaningful contact.
One of the better-documented modern encounters occurred beneath Krynhold, where the Brass Blades discovered a group of Duergar enslaved by a beholder. The episode demonstrates both how far Duergar populations can exist from familiar surface routes and how dangerous the Underdark remains even for peoples adapted to living there. It should not be taken as representative of Duergar political status elsewhere.
Religion and Identity
Duergar worship the gods of Kor Sirok according to local history and personal devotion. There is no separate universal Duergar pantheon, and no deity defines the ancestry as a whole. Religious practice in an isolated stronghold may differ greatly from that of Duergar living among surface dwarves or in a mixed Underdark city.
As with other ancestries in Kor Sirok, local culture matters more than biological ancestry in determining how a person lives. A Duergar’s settlement, clan or family, profession, religion, alliances, and individual history are more reliable guides than assumptions based on ancestry alone.