School conjuration [poison]; Level class 3
Casting Time 1 standard action to setup - Requires partial concentration after setup(checks if caster gets damaged)
Components V, S
Range -ft.
Effect cloud spreads in 20-ft. radius
Duration 1 hour/caster level
Saving Throw Fortitude partial; see text; Spell Resistance no
This spell generates a bank of fog, similar to a fog cloud, except that its vapors are Purplish, green and poisonous. These vapors automatically kill any living creatures mind with 2 or fewer HD (no save). A living creature with 2 to 4 HD is slain unless it succeeds on a Fortitude save (in which case it takes 1d4 points of Constitution damage on your turn each round while in the cloud).
A living creature with 5 or more HD takes 1d4 points of Constitution damage on your turn each round while in the cloud (a successful Fortitude save halves this damage). Holding one’s breath doesn’t help, but creatures immune to poison are unaffected by the spell.
Unlike a fog cloud, the vermin kill moves towards points you point out on a map circling the pointed out points for how long the caster desires. The cloud moves anywhere from 0-30 feet every combat round.
Because the vapors are heavier than air, they sink to the lowest level of the land, even pouring down den or sinkhole openings. It cannot penetrate liquids, nor can it be cast underwater.