Ark//wind Saga

Summary
The world of Ark//Wind Saga is an isekai world where the children of destiny must fight for their own survival in a new and dangerous world. They must gain the favor  of monster girl like familiars and establish a soul resonance with them in order to use their powers to defeat the children of the apocalypse who want to destroy the world with their own familiars by ushering in the Great Calamity. As the series progresses more secrets are unveiled about the world that the children of destiny are summoned into including the nature of the familiars and the goddess that summoned them to this world which will make them question everything they know about the world they've arrived in, their role in this new world as the chosen heroes and themselves.

The Power of the Verse
This verse is moderately powerful in the beginning with the Children of Destiny having the ability to summon city destroying familiars very early on, furthermore each of the familiars that they summon are able to augment their abilities with various hax such as self-healing, soul manipulation, time manipuation, mind manipulation and partial possession. Also each of Children of Destiny and the Children of the Apocalypse have the ability of invocation achieve through soul resonance to essentially fuse with their familiars.

The Children of Destiny are actually rather weak without their familiars and often have to resort to outsmarting the entities that are to become their familiars. Despite this, they are still on the level of skilled warriors and are quite proficient with their weapon of choice they are however no stronger than peak human. The only exception to this would be the white mage who must use significant time in the preparation of rituals, the drawing of sigils, and the imbuing of intention to perform even the simplest elemental spells. There is one notable familiar which the white mage has access to which is the fox princess who has the ability to enter into a pocket universe outside of time where the fox princess can control how the rate of time flows in the outside world compared to her own pocket dimension, they cannot however affect the world the plot resides in when time is stopped as they need to be within the area surrounded by the tori gates created. The ritual to enter this pocket universe has a long preparation time during which the fox princess is extemely vulnerable so it is unwise to use in the heat of battle.

The Strongest Characters that are hinted to exist within this universe from the start are universals this includes the original Hero King, the adventurers who aided him and his familiars.

Towards the end of the series there is a massive spike in power due to the fact that both the world ending calamity and the goddess herself are both multiversal level with the abilty to create and destroy multiple worlds including the world that the Children of Destiny and the Children of the Apocalypse originally hail from a fictional version of our own familiar 10-dimensional universe.

Note: The Calamity is something shadowy that exists outside of even the multiverse that the goddess controls and is said to come from the void. Eternity or The Eternal Dream is something which gives power to both The Goddess and the Calamity is of an unknown tier it however is more of a force within the universe similar to Akasha or The Root within the Nasuverse, if it were assigned a tier it would be tier 0 and it's presence within the universe is represented as a twisting mass of unseen vines and thorns it does not have a will and cannot be destroyed.

Astraea
The Star sea this is the world of conceptual beings and things beyond the realm of the physical it is a place where gods and celestials transcend to before returning to their world. It can be seen as an Astral Plane beyond even the world of the spirits and it is the place that The Children of Destiny draw their strength from. The Sword of Astraea forged from the essence of this realm is known as the only weapon that is capable of slaying even the gods. It is said to be the final home of humanity and it's last hope.

Maelstrom
Maelstrom is a very feudal society it is the world where beastmen come from and there are various societies within this world one of the more notable civilizations The Eastern Kingdom is divided into two countries the kingdom of Shang is ruled over by the celestial dragon and is a power based meritocracy that values knowledge above all else. The other kingdom The Moon Kingdom is ruled over by the Kitsune Princess who is said to be one of the wisest rulers that is able to see all sides of a conflict the people of the Moon Kingdom adhere to the path of harmony and are one of the most industrious nations. It is a world where most of the citizens are warm and hospitable and the cultures worship nature above all else. It is named Maelstrom due to the affinity with the wind that most of the citizens of the world seem to have. It was a world that was once extremely technologically advanced but a machine apocalypse contributed to the world being in it's current state.

Solstice
This is the world of Celestials both Angels and Demons, and it is a world where many of the residents do not have a physical form. It is a world of many beautiful crystal structures and of high mountains and caves it is a cold world completely barren of any recognizable technology instead it is a world where magick has replaced any function that technology might have had and it is a world where the denizens have extremely powerful instrinsic magic. It is a world that has existed since the beginning of the Ark//wind Saga universe and has a continuous cycle of death and rebirth. The was a continuous war between the Angels and Demons in the ancient past but there is now an uneasy standstill between the two opposing forces.

Ignis
A World that existed very close to our own in the ancient past, it is a spiritual would who's technology and religion was influenced by the Moon Kingdom and influenced the continent of Asia in the nameless world. In the ancient past the denizens of Ignis were frequently summoned by the Onmyouji of the Unnamed World. The people of the world of Ignis consist mostly of Youkai or Youguai, they are organized into a very strict hierarchy, usually the further up on the hierarchy the stronger and wiser the youkai with some of the nobility having lived thousands of years. This world existed long before the Unnamed World and is the second oldest comparable to only solstice. It is a very isolationist world which makes it's relationship with the continent of Asia even more of a mystery.