Intelligent Mist
(Alteration)

Range:  10 yards
Components:  V, S, M
Duration:  1 round per level
Casting Time:  3
Area of Effect:  Special
Saving Throw:  None

This spell is an extension of the 2nd-level talking mist spell and can be "triggered" to appear under certain circumstances. The spell can summon a Class I type of intelligent mist from the elemental plane of air. Once it appears, the mist delivers an introductory message, but doesn't dissipate immediately after delivery. It can then stay for its duration and converse with anyone in the area.
The mist is actually a being from the elemental plane of air (albeit a low powered one). The difference between intelligent mists and other summoned creatures is that the mists actually have access to the knowledge of their summoner. This includes 1 language (chosen by the wizard) and information (not spells) dictated by the casting wizard.
For a detailed description of the different types of intelligent mists, see the monster description provided with the 5th-level magic mist. As with the talking mist spell, the material component is the smoke of a burning piece of paper with the initial message written on it.
Once the spell duration ceases, the mist returns to the plane of air, but if the spell is "re-triggered" before this happens, the same mist is summoned again, with knowledge of previous encounters.

