Great Forest of Evasha

Great Forest of Evasha (エイヴァーシャー大森林) or the Great Sea of Trees is a forest located at the south of Abelion Hills.

Background
It was said that the Great Forest of Evasha was a place where the Elf Country is located. This large forest seems to be filled with monsters that are considered dangerous to the Slane Theocracy's troops.

The Ruler of Conspiracy Arc
During a conference held between the Six Cardinals, the Theocracy was noted to be currently at war with the natives of the Great Forest of Evasha. Particularly, the Theocracy had a cooperative relationship with the elves in the forest at first. However, at some point in time, relations between them fell apart, and the Theocracy was now warring against the Elves with their own power.

As stated by the Six Cardinals, due to the naturally abundant monster population and dangerous terrain within the Forest, their army was having difficulty traveling through it that was only further worsened by the elves' usage of their mastery over guerrilla warfare and forest fighting to launch various sneak attacks against them. This, in turn, happens to lead the elves having deadlock the Theocracy's advance and preventing them from reaching the Elf Country's main capital.

Eventually, the Theocracy higher-ups decided to cease prolonging the war against them and agreed to send the Holocaust Scripture, who were specialists in Anti-Guerrilla warfare and Anti-Terrorism attacks to counteract the Elves resistance.

The Craftsman of Dwarf Arc
The Elf King noted that the Slane Theocracy feared the possibility of losing their military troops to the monsters in the Great Forest of Evasha.

However as revealed by one of the Elf King's former concubines, thanks to the efforts of the Holocaust Scripture, the Theocracy's advance in the forest has greatly improved while his elven forces has plummeted due to the Scripture now rendering their guerrilla tactics useless. Because of all this, it hinted how the Theocracy was now slowly making their way out of the forest.

The Half Elf God-kin Arc
and The Half Elf God-kin II Arc The forest was being invaded by an army of 40,000 soldiers of the Slane Theocracy. However the army was stalled due to a single archer with a magic bow. The commanders of the army believing that it would be a bad strategy to go around and be picked off by a mobile attacker, then opted to sacrifice a 1,000 soldiers to allow members of the Holocaust Scripture to eliminate the archer. The plan worked successfully however the operation resulted in the death of the vice captain.

Ainz Ooal Gown along with Aura Bella Fiora, Mare Bello Fiore and Fenn arrived in the Great Sea of Trees with the intent of finding the dark elf communities of that the 6th Floor Guardians could interact with them. The group eventually arrived at the elven capital at Crescent Lake. After Ainz spent days of trying to make sense of the city, he located a lone elf and kidnapped him to interrogate him to tell him where the dark elf villages were. After erasing the elf's memories, Ainz took his party to the Three Trees, where nearest village was suppose to be situated.

The group had trouble locating the village due to the crowded trees, forcing Aura to go out with Fenn to see if she could locate. She eventually returned though, bringing a magical bear monster in tow. The Sorcerer King seeing the bear had a use for it as part of his Mission: Red Ogre Cried, which he planned to implement in order for Aura and Mare to quickly befriend the dark elves.

Said plan involved sending the bear to attack the largest dark elf village in the area where Aura came in and save the day by 'driving' the beast away. After her feat, Aura was welcomed into the village as a guest by the elders who were eager to know her and her 'uncle' and brother that would soon arrive. After three days Aura went with the rangers on their hunts and displayed her superior ranger skills, bringing back game such as the Gigahorn Elk.

When Aura's uncle and brother arrived, Ain Bell Fior and Mare, Ain quickly introduced himself to the village. Later he managed to be given a temporary apprenticeship with Chief Pharmacist Mango Gilena. During his stay in the forest, Ain helped defend the village after a Giant Hypnotism Python attempted to attack it.

Later it is revealed that the Supreme Executive Council of the Theocracy intends to lay claim over the forest to use it as a natural barrier against the Sorcerer Kingdom. A part of the plan to establish a permanent human presence there is to capture the elven capital, hence why their army refrained from burning the forest during their assault.

Layout
It was implied there are multiple forest terrains to the south which may happen to be the Great Forest of Evasha based off of what Igvarge seems to be most likely inferring to.

According to him, there had been an establishment of large settlements somewhere there as it was a place where the Dark Elves are known to dwell in.

The forest was a hazardous place as it contains many dangerous monsters with terrain that made navigation to be difficult. The area was not so easily traversed but there were no chokepoints in the Great Forest of Evasha where the elves reside. There were certainly places with dangerous monsters, small nations of demi-humans, and impossible labyrinths, but there were no structures that could be called a fortress or impassable physical barriers.

Overall the forest earned its moniker from the Sorcerer King as the Great Sea of Trees, as it was a bright green carpet that stretched to the southwest of the Theocracy lands. Every time the wind blew the whole forest swelled and waved like an ocean. The land the forest encompassed was much larger in size, having enough space to include the Great Forest of Tob and the Azerlisia Mountains range put together and perhaps it was even large as the Re-Estize Kingdom itself. Within this forest are trees of tremendous size as far as the eye can see, and it is impossible to find anything unique.

Features
From the sky it was near impossible to see anything due to the forest canopy. Only two landmarks stuck out:


 * Crescent Lake: The site of the elven royal capital.
 * Earthen Road: An earth-colored path created by the invading Slane Theocracy which has been making their way through the forest by cutting down the trees to reach the capital to create a direct route. However since the forest is so large, the path amounts to a thread from an aerial perspective, though in reality it stretches over a 100 meters wide.
 * Three Trees: A place south of the elven capital and acts as a landmark of where the dark elf settlements are located.
 * Aju: A dark elf village near the Three Trees.
 * Dark Elf Village: An unnamed dark elf village south of Aju and the largest village in its immediate area.

Known Inhabitants
Based on the conversation spoken of among the Theocracy's Cardinals, it was mentioned that there are elves living in the Great Forest of Evasha. Besides elves other intelligent races such as Garicus dwell in the forest.

Not only that the forest contains various dangerous monsters species both on land and within the lake, such as the Howling Bird, Ankyloursus, Gigahorn Elk, etc.

At the top of the ecosystem were the Fifteen Lords of the Great Sea of Trees.


 * Ankyloursus Lord

Trivia

 * It is also probable that elves from the Elf Country are using guerrilla tactics against the Theocracy in this supposed location during the war.
 * It was probable that when the dark elves left the Great Forest of Tob, some could have possibly migrated and settled here in the Great Forest of Evasha instead, The Mass of the Dead Game did indeed confirm those dark elves did move there.
 * In Mass for the Dead, Ian Als Heim recalls that it was passed down that the dark elves that ruled the Great Forest of Tob relocated to the Great Forest of Evasha.
 * Considering that the Elf King is the son of one of the Eight Greed Kings, it is most likely that the forest was once part of their original territory.