Elemental

Elementals (エレメンタル) are spirits affiliated with the various incarnations of nature from YGGDRASIL.

Background
So far the series have established that elementals are categorized with earth, water, wind, and fire. The types of elementals in YGGDRASIL that could be summoned were fire, water, wind, and earth. There were also the composite Elementals of fire + earth = magma, water + wind = blizzard, earth + water = bog, fire + water = hydrothermal, earth + wind = sandstorm, fire + wind = firenado, and more.

Though there are a few other elementals whose element is not defined:


 * Primal Fire Elemental
 * Primal Air Elemental
 * Primal Water Elemental
 * Primal Earth Elemental
 * Primal Star Elemental
 * Swamp Elemental
 * Earth Elemental

Appearance
Elemental resemble their elemental alignments.

Abilities
Elementals are spirit type monsters whose powers vary depending on the elemental alignment and rank. Tier Magic can be used to summon these spirits, a 1st tier spell is able to call upon a Lesser Elemental though they can only exist for a short time.

Among these, the elementals of fire, water, wind, and earth could manifest as high-ranking elementals with levels in the low-40s, mid-rank elementals with levels in the mid-20s, and as lower-rank elementals with levels in the single digits.

Composite elementals, they could manifest as high-ranking elementals with levels in the mid-50s, mid-rank elementals with levels in the low-30s, and as lower-rank elementals with levels in the low-10.

The most powerful ranked elementals are the Primal Elementals. In terms of power, evidence shows that they are between the levels of 85 to 90. Primal Elementals were highly resistant to negative ailment attacks from undead.

Though the highest ranking elementals were said to be defiled elementals, or holy elementals.

Trivia

 * The Staff of Ainz Ooal Gown is able to summon high-ranking elemental of earth, water, wind and fire.
 * In the Overlord Web Novel, elementals along with demons and devils appeared more frequently in the Great Tomb of Nazarick than summons.
 * In Overlord: The Undead Oh!, it's revealed that there is a the racial change item called Resource Fragment that can allow a being to turn into a Half-Elemental.
 * In Mass for the Dead, a Air and Dark Elemental occasionally appears as enemies.
 * While Mare Bello Fiore has a item from Bukubukuchagama that allows him to summon an elemental only with a spell of the corresponding element, Ainz gave him Elemental Gacha to augment his abilities during their trip to the Elf Country.