Fire/Water Fundamental

Fundamentals are among the weakest beings of the elemental planes: a pair of bat-shaped wings with no head or torso between them, forever in flight and never landing. All share the same defenses. Only magic or magical weapons hurt them, sleep, charm and other mind-affecting spells fail, and protection from evil and similar spells count them as enchanted. Their one attack is a diving ram for 1d6 that costs them nothing. A dead fundamental dissolves back to its home plane almost immediately unless its remains are sealed in a blessed vessel within two rounds.

These span about 2 feet, blue-black and wrapped in constant flame, and they can kindle stray fires when brushing past paper or dry leaves. Flocks swirl around foes in a frantic whirl; nobody knows how they find targets, though sensing warmth is the likely answer. Fire cannot hurt them. They haunt volcanoes and burning gas vents, often trailing a stronger fire creature. Sages guess they are dragged across by accident when a greater elemental crosses or is summoned, or that such elementals send them on errands of their own. Their bodies, if captured in time, help brew a potion of fire resistance.

Their clear, dripping wings measure 1 to 2 feet and throw off a constant fine spray. Sunlight turns a flock into a glittering rainbow that paints the waves with color. Rather than circling, they charge en masse straight at one victim. Being nearly invisible, they impose a -2 penalty on opponents' surprise rolls except in direct sunlight. They live only over large, deep waters such as oceans and great lakes, drinking it and needing to dunk themselves fully at least hourly to survive. The water of their bodies goes into a potion of water breathing, provided it is caught in a blessed vessel or mixed into the brew within two rounds of death.