The Miasma is a purplish gas, produced by the Skull of Corruption and used by the priests of Vaermina. Any mortal exposed to it will fall into a deep sleep, which slows the aging process and can last for extended periods of time. A long sleep under the Miasma can cause brain damage, and some victims lose their mind entirely.[1]


In the quest Waking Nightmare, the whole of Nightcaller Temple is filled with Miasma, and sleeping enemies within awaken when disturbed. It is eventually learned that Erandur - then known as Brother Casimir - released the gas and fled while the other priests of Vaermina and the Orcish Invaders succumbed to its effects.



  1. Dialogue with Erandur