Conjuration (Creation)
Level: Arcane 5
Components: V, S
Casting Time: Attack action
Range: Medium (100 ft. + 10 ft./level)
Effect: Cloud spreads 30 ft. wide and 20 ft. high
Duration: 1 minute/level
Saving Throw: See text
Spell Resistance: Yes

A bank of yellowish green poisonous fog billows out from the point the character designates. The fog obscures all sight, including darkvision, beyond 5 feet. A creature within 5 feet has one-half concealment (attacks suffer a 20% miss chance). Creatures farther away have total concealment (50% miss chance, and the attacker can't use sight to locate the target). The fog's vapors kill any living creature with 3 or fewer HD (no save) and cause creatures with 4 to 6 HD to make Fortitude saving throws or die. Living creatures above 6 HD, and creatures of 4 to 6 HD who make their saving throws, take 1d10 points of poison damage each round while in the cloud. Holding one's breath doesn't help.

The cloudkill moves away from the character at 10 feet per round, rolling along the surface of the ground. (Figure out the cloud's new spread each round based on its new point of origin, 10 feet farther away from the point of origin where the character cast the spell.)

Because the vapors are heavier than air, they sink to the lowest level of the land, even pouring down openings. It cannot penetrate liquids, nor can it be cast underwater. A moderate wind (11+ mph) disperses the fog in 4 rounds; a strong wind (21+ mph) disperses the fog in 1 round.