This spell does not have a direct equivalent in vanilla.
Obscuring Mist
Level: 1
School: Conjuration
Sphere: Weather
Range: Long
Duration: 6 rounds
Casting Time: 5
Area of Effect: 20’ radius
Saving Throw: None
When this spell is cast, a misty bank of fog billows out from the designated point obscuring all sight. Everyone within the cloud suffer -2 penalty to attack rolls, and have their line of sight halved. Anyone, inside or outside the cloud, trying to attack a creature concealed by the fog with ranged weapons will do so with a -4 penalty to attack rolls. Creatures with blindsight, or that do not rely on sight can fight within the cloud without penalties.