AD&D 2nd Edition

Range: 30 yds
Components: V, S, M
Duration: 2d4 rds + 1 rd/level
Casting Time: 1
Area of Effect: 20 ft cube+ 10 ft cube/level
Saving Throw: None

By casting this spell, the wizard creates a billowing wall of misty vapors in any area within the spell range. The wall of fog obscures all sight, normal and infravision, beyond 2 feet. The caster may create less vapor if he wishes. The wall must be a roughly cubic or rectangular mass, at least 10 feet across in its smallest dimension. The misty vapors persist for three or more rounds. Their duration can be halved by a moderate wind, and they can be blown away by a strong wind. The material component is a pinch of split dried peas.