Heavy Fog (Conjuration/Summoning)
Level: Bard 5, Mage 5, Sorcerer 5
Sphere: Creation, Weather
Range: visual range of caster
Duration: 4 rounds
Casting Time: 4
Area of Effect: 30-foot wide, 30-foot high, 30-foot deep cloud
Saving Throw: none

Upon the completion of this spell, a thick, impenetrable fog is conjured. Creatures in this fog have full concealment but their vision is impaired and cannot see more than 5 feet in all directions. Movement is hampered to one-fifth, and creatures have a 40% spell failure. This spell is extremely useful if the party wishes to escape without being chased.

Magic Resistance will stop the creatures from having their visions impaired, though the vapors of the fog conceal them just as effortlessly, as to a creature without magic resistance.