Elemental creature

Elementals are as their names suggest, creatures from the plane of air, land, fire and/or water.

Traditionally speaking, elemental creatures are at their strongest when actually in or on top of their natural habitat, for example, a fire elemental is strongest when it is either in the presence of fire or a material that can be consumed by flame. When detached from their normal element, such creatures become weaker and are not so resilient to being destroyed.

Wizards can summon such creatures when they have gained the knowledge and expertise to summon them; in summoning them, they require a component typically from their plane. So water for a water elemental, rock for a rock elemental (land) and so forth.