Miasma is a part of the Condense Aspect of the Murk Fysa. All tolka start with this fysa.
This is an active fysa. A user can exhale a fine mist of fysa to change the levels of magic and humidity in the atmosphere. This is commonly used to affect the weather to provide ideal conditions for agriculture, and any mist can re-invigorate even dying plants. Fauna or people who inhale the miasma may feel nauseated, but it's not normally enough to affect them negatively otherwise. Miasma can cause magitech to jump start or short circuit.
Two or more users (OR a user and a daemon) can create rain, even indoors.
This mist is different from a mist expelled by Immanu-- immanu mist has specialized effects, while a tolka's miasma works more naturally.