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Daedric Ruin:
(view on map)
Striking Locale
Discoverable Yes
Completion None
Air Atronachs, Clannfear
West GashVvardenfell
Northwest of Gnisis

Yasammidan is a Daedric ruin dedicated to Mehrunes Dagon found in the West Gash region of Vvardenfell. The ruin was once a shrine to Mehrunes Dagon, and features banners with Dagon's symbol throughout.

Related Quests[edit]


The exterior ruins are crawling with hostile Air Atronachs and Clannfear. During the quest Relics of Yasammidan, you will need to navigate your way past them to search the rubble for Relics of Yasammidan.

Appears only with Necrom


Reformer's Laboratory

Reformer's Laboratory[edit]

The interior of the ruins contains an abandoned laboratory belonging to Sondivel Ulres, a Telvanni wizard who calls himself "the Reformer". The entrance chamber is filled with cages containing the skeletal remains of the Reformer's victims, as well as the bodies of several salamenders used in his experiments. A door here leads to the next section of the ruins, the Procedure Room.

Procedure Room

Procedure Room[edit]

Deeper within Yasammidan, you will find a room containing a sample of Tyranite Calx. Sondivel's Journal can be found on a nearly altar, next to the skeleton of an Argonian victim. During the quest Between a Rock and a Whetstone, a projection of Sondivel will appear above the Tyranite Calx in an attempt to capture Sharp-as-Night. You will need to smash the sample to free him.

Related Achievements[edit]

Achievement Points Description
ON-icon-achievement-Daedric Explorer.png Daedric Explorer 10 Visit all of the Daedric ruins in Vvardenfell.



  • The name of this place as viewed on the map appears as Yasammidin. Both names appear in the upper right corner when approaching this place.