Rune-Warded Gate of Segrummar

Rune-Warded Gate of Segrummar is part of the main quest in the The Descent DLC for Dragon Age: Inquisition.

"Valta's stone sense tells her that the way forward is through a rune-warded gate in the Darkspawn Warrens. The gate can only be opened with Ancient Gears."

Acquisition
Approach the Rune-Warded Gate during the main quest, The Descent