Elemental Golem
A creature fashioned of elemental material by will, this type of golem follows the direction of the one who created it. Elemental golems are not true elementals as they are not free-willed creatures from the elemental planes. Instead, elemental golems are akin to animated objects, controlled at the whim of the animator.
Constructed Nature. An elemental golem doesn’t require air, food, drink, or sleep.
An elemental golem that is reduced to 0 hit points collapses into its core element, filling its space with the residue. In some cases, this residue may still be harmful.