Wall of Smoke

(Spell Compendium, page 235, DnD 3.5)

Conjuration (Creation)

Level: ; Druid 1; Sorcerer/Wizard 1
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Effect: A straight wall whose area is up to one 10-ft. square/level (S)
Duration: 1 round/level
Saving Throw: Fortitude partial; see text
Spell Resistance: No

You wave your hand in a circular motion, and black smoke swirls into existence as a dark wall.

This spell creates a thin wall of black smoke. The wall is stationary once created. The wall blocks sight to a limited degree. Creatures on opposite sides of the wall that cannot see over it gain concealment from each other. A creature can pass through a wall of smoke, but it must make a Fortitude save to avoid being nauseated for 1 round.

A moderate wind (11+ mph), such as from a gust of wind spell, destroys the wall in 1 round.

This spell does not function underwater.