Obscuring Mist

Conjuration [water or fire] Tier: 1 Components: Verbal, Somatic Casting Time: 1 major action Range: 20 ft Effect: 20 ft radius cloud, 20 ft high Duration: 1 minute/level Saving Throw: Constitution negates, see text Mist rolls out from your hands, giving you cover from the goblin archers.

This spell conjures a cloud of mist, smoke or steam, centered on you, or adjacent to you (your choice). The gas obscures all sight beyond five feet. A creature five feet away has concealment (attacks have a 20% miss chance). Creatures farther away have total concealment (50% miss chance, and the attacker cannot use sight to locate the target). 

If you conjure mist, it spreads beyond the original area of the spell, creeping over the ground at a rate of five feet per round.

If you conjure smoke, creatures are sickened while inside the cloud (constitution negates, roll each time a creature enters the cloud).

If you conjure steam, the cloud disorients and deals one point of damage to those inside it during the round it appears (no save)

A moderate wind (11+ mph) disperses the fog in 4 rounds. A strong wind (21+ mph) disperses the fog in 1 round.