Elemental (WoW)  

Elementals are beings of pure energy, corresponding to one of the basic elements; most commonly Earth, Fire, Wind, or Water. Typically, they are resistant to some attack or effects that resemble their element type. (For example, water elementals are usually immune to Frost effects.)

Elementals can be tracked by hunters, beginning at level 26.

Specific crowd control effects which work on elementals include Banish.

Fire, Earth, Wind, and Water Elementals

World of Warcraft Wikibase™