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.
Niln CR 5
Speed fly 60 ft. (perfect)
Melee slam +9 (2d6+1)
Special Attacks drench, drowning fog*
Str 12, Dex 19, Con 14, Int 6, Wis 13, Cha 11
Base Atk +5; CMB +6; CMD 20
Feats Improved Initiative, Iron Will, Weapon Finesse
Skills Fly +12, Knowledge (the planes) +6, Perception +13, Stealth +12
SQ vapor form
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).
Environment Quasi-Plane of Vapor
Organization solitary or gang (2-4)
Niln hail from a plane made of air and water; a vaporous and saturated realm known as the Quasi-Plane of Vapor. They are normally docile creatures, but are quick to anger, and relentless in their attack.
Like many elementals, niln are most at home on their native plane and rarely leave it. They sometimes travel the Elemental Planes of Air when not traveling through their own realm, but usually do not enter other planes unless summoned. Should one find itself on the Material Plane, it seeks to escape and return to its home plane unless confined or summoned by a spellcaster. Assigned tasks are completed to the best of the niln’s ability and they rarely ask for much of anything in return. On the Material Plane, a niln seeks sources of vapor or steam in which to bathe its form so they are almost always encountered in such areas.
When first confronted, a niln surrounds itself with its drowning fog to deter would-be-aggressors. Those that insist on entering the fog and attacking the niln are met by its physical attack; the niln forms wispy tendrils from its form and lashes out at its foes. A niln will use its drench ability to extinguish any source of light its aggressors may be carrying, relying on its darkvision to aid it in the darkness thus created.
Niln from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Scott Greene.