A faint humanoid shape threads through the core of this wild, moving flame. A fire elemental is a force of capricious devastation. Wherever it moves, it sets its surroundings ablaze, turning the world to ash, smoke, and cinders. Water can halt its destructive progress, causing the fire elemental to shrink back, hissing and smoking in pain and rage.
Fire Elemental
Primal Spirit of Heat and Flame
Fire elementals arise when spirits of the Elemental Plane of Fire inhabit flames, burning cinders, and heated smoke. These beings are tangible despite largely being made of flames and particles, and they can uses their vague limbs to ignite foes and flammable materials. Fire elementals typically burn in shades of orange and red, but other colors are possible. Most on the Material Plane are summoned by magical means, or they might appear near rifts amid desert depths, volcanoes, wildfires, or magma flows that connect to their home plane.
Fire elementals might burn in distinctive ways. Roll on or choose a result from the Fire Elemental Compositions table to inspire a fire elemental's features.
All the elements bow to fire. The strongest earth melts. Water boils. Even air ignites. We are all souls of flame, and we know what it is to burn.
5e Tools
Simply flames, which may appear generally humanoid for brief moments when they attack
Fire elementals are simply flames, which may appear generally humanoid for brief moments when they attack. Fire elementals take double damage when attacked by water (including water elementals). They cannot cross a body of water wider than their own diameter. They do an additional 1d8 points of damage against creatures which are cold or icy in nature.
Remember that a fire elemental is constantly burning; such a creature may easily start fires if it moves into an area containing items which burn easily, such as dry wood, paper, or oil. No specific rules are given for such fires, but the GM is directed to the rules for burning oil for an example of fire damage.
Basic Fantasy Role-Playing Game
Beings formed of pure, elemental matter (air, earth, fire, or water) that can be summoned from their plane of origin to serve a magic-user.
OSE
Simply flames, which may appear generally humanoid for brief moments when they attack
Fire Elementals are creatures from the Elemental Plane of Fire, though they may sometimes be found elsewhere. When encountered on the Prime Material Plane, usually as a result of summoning magic, they take the form of a great flickering sheet of flame, which occasionally seems to have a somewhat humanoid shape. Though they can apparently understand what is said to them, they do not usually respond in kind, their language being heard only in the dull roar of burning fire.
OSRIC