Breath Of The Night

Warlock Invocation
Level: Least, 1st lv.
Components: V, S
Casting Time: 1 standard action
Range: 20 foot radius around you
Duration: Instantaneous
Saving Throw: None
Spell Resistance: No

A misty cloud of fog spreads in a 20-foot radius around you when you use this invocation, as the spell fog
cloud. The fog does not block line of sight, but all creatures in the fog have concealment. A moderate wind or any fire larger than a torch immediately disperses the fog. The fog disperses on its own after 1 minute.

(Complete Arcane, Page 134)