Elemental

An elemental is composed of one of the four classical elements of air, earth, fire, or water. They can resist effects such as poison and paralysis, and do not have any discernable front or back, making tactics such as flanking or attacks such as critical hits useless. Like constructs, they cannot be resurrected by magic once destroyed, save powerful spells such as wish or miracle. Elementals usually have darkvision.

Examples include air, earth, fire, and water elementals, invisible stalkers, and magmin.