Miasma Cloud

Miasma Cloud [minor] by Iczer

'sssssssslleeeeeep'

The character can generate a cloud of vapors that induce dizziness, drowsiness and, occasionally, sleep.

Activating the cloud requires an action, and the expenditure of an action every melee round to maintain. The cloud itself extends for 20 feet in all directions, though in a sealed, indoor environment, every round it persists expands the cloud by 5 feet.
Every breathing being in the cloud must make a saving throw vs non-lethal toxins or become drowsy and sluggish. Targets lose an attack per melee round, -2 to all combat abilities, have halved speed and -15% to skill performance. While the cloud is visible, it does not obscure vision sufficiently to provide any form of concealment.
Out of doors, this power is vulnerable to strong breezes. A mild wind has no effect, but anything stronger than 15 miles per hour reduces the cloud's radius by 10 feet. Stronger than 25 MPH and the cloud cannot form, except as a 60 foot trail flowing from the character downwind.
Targets who spend more than a minute in the cloud without succeeding in a saving throw will fall asleep within 1D4 melee rounds and remain so for 1D6 minutes or until woken.