A large amorphous cloud of nearly transparent vapor hovers. Small water droplets dance and play around the form and occasionally drop to the ground. Three large sapphire droplets centered on their form function as eyes. When manipulating objects or attacking, nilns form wispy and vaporous tendrils.
Speed fly 60 ft. (perfect)
Str 12, Dex 19, Con 14, Int 6, Wis 13, Cha 11
The niln's touch puts out torches, campfires, exposed lanterns, and other open flames of nonmagical origin if these are of Large size or smaller. The creature can dispel magical fire as dispel magic (caster level equals the niln's HD).
The niln spends the majority of its time in more or less solid form, but it can assume vapor form at will. It can switch forms once per round as a free action and can spend up to 20 rounds per day in vapor form. A niln in vapor form can fly at 60 feet per round (perfect). This ability is otherwise similar to a gaseous form spell (caster level 5th).