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Yvnei was a Monster not originally born in the Dungeon made by the Dragon God of Thunder Nyzzet, but she was originally a young feather winged Wyrm that came from Vast Plains, escaping from the humans and the strong beasts that roamed the place.

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Her origins were uncertain, as she had once belonged to a large flock of her race, which was shunted down by Human Adventurers to complete several Quests made by the guild of the Town near the Dungeon.

Yvnei still remembered the day her family was mercilessly slaughtered, even when they tried flying away, the Adventurers possessed strong magic and long-ranged attacks, annihilating them from the sky.

Yvnei had somehow managed to escape alive, mostly because she was shielded by her father…

Although she was greatly affected, she chose to fly away and then enter the dungeon to find shelter from the humans.

Because in those times, she didn't have such a developed intelligence nor sapience, she quickly forgot about her family and immersed herself in survivability inside the dungeon, hiding from the Adventurers that went inside to explore it while killing weak and small fry monsters to slowly grow stronger.

Although she was good at surviving, she had a clumsy nature, which often bit her tail several times through her adventures inside the dungeon, such as confronting bosses that were too strong for her or getting inside traps and hidden rooms filled with monsters continuously.

It could be said that her life was filled with too many adventures, and through these unfortunate series of events, she grew incredibly strong, slowly raising and raising in the food chain of Nyzzet's dungeon, to the point that she reached the lower floors and triumphed against the Bosses from Floor 70.

However, in that time, Goghesdum had appeared, accompanied by Odanth, they beat her almost to death, and ended up recruiting her to their group… this was all pretty sudden for Yvnei, but she adapted fairly quickly.

Goghesdum and Odanth saw potential in her, and instead of using her as Experience Points and food, they nurtured Yvnei and taught her many things.

Although Yvnei had a clumsy nature, her powers and talents were obvious, and due to her rare race, something that would not be simply found inside a dungeon primarily focused on Thunder Attribute, she was unique within the group, bringing new abilities and powers that they did not possess.

Goghesdum taught her magic and alchemy, while Odanth taught her physical fighting and other skills… which Yvnei rejected to learn because of how degenerate they were.

Through many trials, Yvnei managed to break through her Level cap, finally evolving into the pinnacle of mortals in Dragon-type monsters, an Elder Dragon, she was now only one step before becoming a Living Deity, much like Goghesdum and Odanth at her side.

Through her evolution, Yvnei gained a more complex intelligence, and finally developed better emotions and a sharper memory alongside her own well-defined personality…

But alongside sapience and intelligence, the memories of when she was younger became clearer and easier to understand… the death of her family and that of her father greatly affected her fragile heart.

Yvnei became gloomy and depressive, and after dozens of years where Goghesdum and Odanth worked as her emotional supports while helping her nurture the Siren, she slowly grew through it and became less clumsy alongside being more mature, perhaps even more than Odanth in that regard.

Goghesdum was a strong maternal figure for the young Dragoness, helping her more than even Goghesdum had thought possible of her, as she always thought that she was a cold and calculative person… but the adorable Yvnei ended up melting her heart for good, becoming a lovable 'mommy' which Yvnei put a lot of trust into.

Meanwhile, although very deviant in her nature and passions, Odanth was still a clear elder sister figure for Yvnei, always cheering her up through the struggles of her life and the memories of the death of her family. Yvnei slowly grew anew due to this emotional support, and instead of harboring hate towards the Humans that took the life of her family, she forgave them and decided to live peacefully while helping and nurturing her beloved people, the Sire, whose Goghesdum had given the responsibility to Yvnei to take care of.

Much like the Lizardmen and Viper, after a dozen of generations, the Siren became High Siren, developing great intelligence, similar or even better than that of Humans.

Unlike Harpies, Sirens were a female-only monster race of women with strong bird-like appearances, some of such appearances being larger and often more monstrous than those of the adorable Harpies.

Sirens had bigger bodies, their legs and talons had three joints, making them seem incredibly tall, their bodies were often completely covered in feathers unlike Harpies and their wings were immense. Their nature was that of fierce monsters, but after being taught many things by Goghesdum and Yvnei, they became more intelligent until a change in their race happened, converting the Siren race into High Sirens.

Their appearances became more streamlined and delicate, resembling Harpies mores, but their sizes remained the same, and so did their monstrous strength and their female-only characteristic trait.

High Sirens, just like Sirens, needed the seed of a male from a different species to copulate and lay eggs to keep in their race… In tales, Sirens would often capture males they found strong enough to be deserving of being the fathers of their children, and because of this, Sirens are often seen as terribly frightful monsters, and such bad reputation was even moved to Harpies, who do not have any necessity of doing anything of the like, as they possessed males in their race.

The seed that Sirens needed could be of almost any humanoid demi-human or even monsters, as long as their physiologies matched enough, even Lizardmen and Viper could copulate with them, as they were all monsters and shared a similar trait despite being incredibly different in appearances.

Due to this, the High Sirens and Sirens of Yvnei's City did not suffer many issues with reproduction, as males from the other two cities, Lizardmen and Viper would come every so often in look for a wife… Those that were usually rejected by their ugly appearances or asocial behaviors found love in Sirens, who accepted mostly any male as long as they were willing to love them back.

Many such families happened like this, and every so often, the males would have more than one wife as the Sirens did not mind sharing their husband with their entire family of sisters, so they could all bear children and maintain their race's population.

High Sirens, unlike High Lizardmen who had developed towards the study of magic, technology, and science, and unlike the Viper who had developed towards expressing their love and passion through arts, developed into a different path, that of production.

High Sirens were incredibly talented at crafting, despite having their upper hands covered in feathers, they had proper claw-like hands, unlike Harpies who could only use their wings as fingers carefully.

Their sizes, strength, and caring nature only helped in their path towards industrialization, which began to progress by leaps and bounds, even more than any Kingdom in the Border Continent (although not comparable enough to the advancements in the Central Continents).

They developed factories for the mass production of items which they sold to the other two cities, they also had incredibly talented artisans, agriculture experts, and monster cattle caretakers.

Unexpectedly for Goghesdum, High Sirens became an essential tribe for the sustenance of the other cities.

Yvnei had found much distraction in taking care of her family of Sirens, her beloved citizens. And helped them even further in developing their technology and production-based economy and city.

And as of now, a few hundreds of years had passed since then, and Yvnei was resting in her large palace in the middle of the High Siren Nation, while in her humanoid form.

Yvnei had an appearance rather similar to Sirens despite her great difference in the race. She had pale white skin, which was smooth alongside having a rosy hue. From her knees, she had two more jointed bones, making her legs triple jointed, giving her a very tall size whenever she stood up, surpassing four meters.

From her knees, the legs were covered in yellow scales similar to those that birds have, and her talons had three claws in front and another on its back. Both of her arms ended covered in the same yellow scales, while her fingers had long black-colored claws.

Her body was covered in fluffy green, yellow, and azure feathers, and her arms had long wings which she used to fly through the sky at incredible speeds.

Her eyes were golden, and her hair was long and bright green, alongside possessing more of those yellow scales around her shoulders and neck.

She had a long snake-like tail which was covered in these bright green, yellow, and azure feathers atop her round butt, which she had entangled across her body.

Two golden-colored horns grew from each side of her head, and she had a small emerald jewel at the middle of her forehead, and another larger one in her chest, right in the middle of her small breasts… despite the little assets there, her hips were wide and sexy.

Yvnei was currently sleeping peacefully after having gathered the High Siren population yesterday for their yearly festivity where various Sirens that have not found a husband would have dates with males from the other there cities governed by the Elder Dragons. Of course, no one was forced into this and anyone that entered did it willingly… so they could not complain if they did not like the one, they were chosen to have a date with.

Just as before, the large-scale event was a success, with 99% of the couples selected as dates staying together, High Sirens were incredibly beautiful and accepted almost any male in appearance as long as they were responsible men that were to love them and bring children to their lives… so everything went excellently because that was the purpose of most of the males that traveled to the city, they were rejected by their original tribes and just wanted a woman that could accept them just as they were, and it ended incredibly well for all.

Although clumsy, Yvnei was incredibly talented at matchmaking and was a romantic girl that liked to read fictional romance books written by the High Viper city… although she was not into constant sexual intercourse like Odanth, and was only interested in the romantic aspect.

"Fuuu… Aah, my prince~ Bufufu… No… We are not meant to be together… Fuuu…" muttered Yvnei, talking as she slept, most likely dreaming about being a country girl that was selected by a prince as her wife, which were the stories she often liked the most.

However, her fantasies of romance were quickly broken as she was woken up by wild and beastly sounds of monsters, alongside her guards, beautiful High Siren women rushing to her palace to alert her of what was happening.

"Yvnei-sama! Yvnei-sama! A large group of strange Undead monsters is approaching the city!" shouted the High Siren guards as they came flying through the large entrance of the palace.

"UWAAAAH! …Eh? What is it?!" asked Yvnei.

"Invaders, my lady!" said a guard.

"Goddess-sama, a large group of monsters has appeared! They seem like Dragon-type and Reptile-type monsters… but they are not the ones we are used to! Their Attributes seem different than the ones we usually find in here, and they're all Undead!" said another guard.

"U-Undead?! T-That's… dangerous! Quickly close the gates of the walls, and activate the defense mechanism!" said Yvnei, as she flew out of the palace and over the city, glancing at the putrid reptile and draconic monsters rushing through the vast landscapes towards her city.

Suddenly from down below her, a large magic barrier formed a dome protecting the entire city!

Flash!

It seemed that the High Sirens had invested way more resources into self-defense mechanisms, mostly because of the position of their city, which was closer to many resources but also many monster nests.

"All good… alright, I will dispose of these monsters and be- Huh? Why are they… so strange?" wondered Yvnei as she glanced at the monsters beginning to breathe foul-smelling gases of sickly green colors and black and gooey liquid from their legs and claws, infecting the surrounding and slowly changing it as if space itself was distorted… this was a domain!

"Ueh?! A Domain?! How can these monsters know about making Domains?! A-And their power… it is way too overwhelming! Just what are these creatures?!" asked Yvnei, contemplating what to do as she transformed into a giant, one-hundred meters tall Feathered Wyrm that possessed two long wings and a golden beak, resembling a cross between a giant bird and a snake than a Wyrm.

Yvnei felt that if she did not act quickly, even the barriers created by her people would not be enough!

"Uwaaahh… T-This is way too sudden! They are too strong! Do I attack? Do I not? If I do not go, my people will die! But if I go… I will surely die too! Goghesdum-sama… Where are you…?" wondered the adorable Yvnei, even in her giant dragon form, she was still very indecisive and clumsy and often became too nervous without the emotional support of Goghesdum or Odanth.

FLASH!

Suddenly, a flash of dark lightning appeared in the sky, as an enormous dragon, even bigger than Yvnei covered the whole sky!

However, it was not Goghesdum, but it was a metallic dragon with dark-colored scales and a monstrous expression.

"Divine Beasts… Who are these Gods and why did they leave me such a wonderful gift~?" it said with the voice of a mischievous woman.

"W-What is happening now…?" muttered Yvnei in awe.

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