Bastion of the Pure is a former lyrium mine beneath the Deep Roads currently occupied by the Sha-Brytol. It is the 5th level in The Descent DLC.
Background
According to Valta, this area has not been discovered before. Therefore, not much is known beyond what the Inquisitor sees and does. This place is filled with untapped lyrium veins and Shal-Brytol.
Involvement
The Inquisitor follows Valta through the bastion in hopes of discovering the source of the earthquakes.
Enemies
Quests
The Descent
Holding the Deep Roads
Codex entries
Codex entry: Chronicles of a Forgotten War