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Obscuring Mist

School conjuration (creation); Level cleric/oracle 1, druid 1, magus 1, sorcerer/wizard 1, witch 1; Domain air 1, darkness 1, water 1, weather 1

CASTING

Casting Time 1 standard action
Components V, S

EFFECT

Range 20 ft.
Effect cloud spreads in 20-ft. radius from you, 20 ft. high
Duration 1 min./level (D)
Saving Throw none; Spell Resistance no

By the way...
The effects created by this spell do not move with a ship.

Source Skull & Shackles Player's Guide

DESCRIPTION

A misty vapor arises around you. It is stationary. The vapor obscures all sight, including darkvision, beyond 5 feet. A creature 5 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).

A moderate wind (11+ mph), such as from a gust of wind spell, disperses the fog in 4 rounds. A strong wind (21+ mph) disperses the fog in 1 round. A fireball, flame strike, or similar spell burns away the fog in the explosive or fiery spell's area. A wall of fire burns away the fog in the area into which it deals damage.

This spell does not function underwater.