Cloud Kill

1 Stnd|100+10/lvl|Cloud 20rad 20h|1min/lvl|
Fort Part|No
The gas kills any living creature with 3 or fewer
HD(no save). A living creature with 4-6 HD is
slain unless it Fort Saves, and then takes 1d4 Con
each round on caster turn while in the cloud.
A creature with more than 6 HD takes 1d4 points
of Con damage on each round while in the cloud,
Fort Halves. Holding Breath doesn't help.
Creatures Immune to poison are unaffected. The
cloud moves at 10ft /rnd away from the caster.