Similar to more common spell, poison cloud, noxious fumes can be very annoying and dangerous nuisance. The most powerful magicians of the art of toxicology have found a way to produce gas like substance containing venomous constituents. With intense body and mind consentration one can channel noxious fumes through his glands and skin. Since fumes tend to spread out fast in the air it is very important that the caster masters his spell well. Knowledge of toxicology helps focusing the gas into cloud like formation and thus avoiding the unwanted targets.