Quality Base Value File:GoldIcon.png Trait Effects Enchantments Type Set The Miasma is an item found in The Elder Scrolls Online. 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.