Soul Eater

Soul Eaters (ソウルイーター) are legendary undead monsters that were summoned by Ainz Ooal Gown for his war against the Re-Estize Kingdom. They appeared on the battlefield in the Katze Plains.

Appearance
Soul Eaters are skeletal horses with an aura that shines a light on their chest. They are beasts made out of bones, with tendrils of fog replacing their flesh and blood. The fog sparkled everywhere, pus yellow and emerald green.

Background
In the New World, it was stated that three Soul Eaters alone once appeared in a beastman city, killing over one hundred thousand beastmen. To the countries, Maruyama stated that their presence alone is enough to cause a national state level emergency.

Without at least a 3rd-tier magic caster present, even facing them was next to impossible. But at the same time, only someone or group of the heroic level can do anything, so its a crisis for all the surrounding nations to deal with.

Abilities
Soul Eaters has long-range attack skills with many uses. They can receive a temporary power-up buff for killing its target through the skill, making it hard to defeat. In other words, Soul Eaters are the kind of undead with an area-affecting ability. Soul Eaters could consume the souls of the deceased for sustenance while also growing stronger the more souls they ate. They radiated an aura of fear.

Also, they are capable of killing everyone who smelled its breath of instant death. When one encountered a Soul Eater in YGGDRASIL, it would have a scaled level to match the average level of the party. A situation in which they could kill players with its instant death effect should only occur once per hundreds of encounters. Because of that, Soul Eaters were rarely ever used despite their unique ability.

Trivia

 * Just like the Death Knight, they are legendary undead in the New World.
 * Five hundred of Soul Eaters were used as mounts for Death Knights and various Nazarick Guarders during the annual war between the Re-Estize Kingdom and the Baharuth Empire.
 * On the adventurer rating system, Soul Eaters have a difficulty rating estimated at 100 to 150. This would make them equivalent to a level 33 to 50 monster in YGGDRASIL.