Golem

Golems (ゴーレム) are artificially created constructs.

Background
According to the Web Novel, if YGGDRASIL was a normal DMMO-RPG, the body of a monster would disappear immediately after death, so this would provide many advantages to the players.

For starters, a player could make an artificial Golem made out of Dragon Bones due to the amount of data put into it. In the New World however, because their production took considerable time, effort and cost, even the weakest ones would required a considerable amount of gold coins to make it.

By playing around with this data through the use of creator tools, one could create their own Golem. In addition, the player could programmed that Golem as an AI to use for gate keeping and for transportation.

Appearance
Golems come in a myriad of forms depending on their purpose and materials used in their construction. Common Golems are created from wood, clay, flesh and stone, but others can be made out of almost any kind of material.

Abilities
Golems are incredibly strong constructs with endurance comparable to the undead. As the Golems are artificial creations, they do not need nourishment or sleep. Additionally, Golems will never suffer from fatigue or even the ravages of time, and thus, they were treasured as guardians and laborers. Created through magical means, Golems could obediently carry out their master’s commands once they received them.

Trivia

 * Aura currently commands a troop of Golems in creating a stronghold in the southern Great Forest of Tob.
 * Originally, the Golems from Nazarick acted as the spectators in the Amphitheater located at the 6th Floor of Nazarick.
 * If an NPC revolt happens, Ainz Ooal Gown can telepathically order the Golems from Nazarick in case of emergency.
 * The Magician's Guild in Re-Estize use wood golems as security guards.
 * Borrowed from Nazarick with permission by Ainz, a set of Golems have also assisted in the fortification of Carne Village.
 * There are four Golems standing guard over the Empire's captured Death Knight. They were once considered as contenders for a supplemental workforce, but due to cost and logistics, that idea was scrapped in favor of the undead, which were much more strategic for economical use.
 * The Royal Palace of Feo Berkana was once guarded by golems, until they were destroyed by Olasid'arc Haylilyal.
 * The golems used by Nazarick portrayed in the Anime differ from their portrayal in the Manga, as the Anime depicts them as animate suits of armor, wheras the Manga depcits them as bulky stone constructs.