Murderous Mist

(Spell Compendium, page 145, DnD 3.5)

Conjuration (Creation)

Level: ; Druid 4
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: Cloud spreads in a 30-ft. radius, 20 ft. high
Duration: 1 round/level
Saving Throw: Reflex partial; see text
Spell Resistance: No

Drawing the power of steaming volcanic vents into your body, you exhale, and a cloud of boiling steam roils away from you.

You create a cloud of scalding hot steam that moves in a straight line, away from you, at a speed of 10 feet per round. Anyone within the cloud takes 2d6 points of damage and is permanently blinded. If a creature within the area makes a successful Reflex saving throw, it takes only half damage and is not blinded.

Any creature within the cloud has concealment. Winds do not affect the cloud's direction or speed. However, a moderate wind (11+ mph) disperses the cloud in 4 rounds, and a strong wind (21+ mph) disperses it in 1 round.