Fog

       Usage: cast 'fog' : cast 122
      Effect: Covers a room with a dense fog
        Cost: 15
    Duration: 20 minutes
Casting Time: 8
      Target: Current Room

This spell covers the room the caster is in with a dense fog, obscuring vision.

The classes that get the spell fog are:

druid      : Level  41 (excellent)
ranger     : Level  61 (good)