Shadows Calling Universe

Introduction
Forerunners are partial-shapeshifting, bigender, creatures created by an unknown Primordial called "Mother". She does this by separating a fraction of her power to create a crystal core called a Crystalian Heart which becomes their brain/heart.
_{(this is alike to steven universe's gem species).}
Forerunners are able to reincarnate and move onto 7 other lives; losing all of their memories of their past life, becoming more powerful and anew.
When Forerunners use too much power, they tend to become smaller in size, and slowly regenerate back to their usual size after a few hours of rest.
_{However, if their Crystal Heart is damaged, they cannot reform into their next life, and this acts as a true "death".}

Forerunner Type	Life Cycle No.	Beast Form	Powers	Power Rating (0-10)	Longevity
Voidrunner	7th, and last	N/A	Gravity/Void + previous life power	10, strongest of all Forerunners	Infinite
Shadowrunner	6th, rarely the 1st	Shapeshifter	Shadow, Darkness	9, can be as strong as Voidrunners at night	Infinite, immortal at night
Lightrunner	5th	Feline/Felidae	Lightning, Weather, EMWs	8, can be as strong as Shadowrunners at day	~15,000 years
Pyrorunner	4th	Canine/Canidae	Fire, Plasma	4, can equal out with Hydrorunners	~10,000 years
Hydrorunner	3rd	Aquarian/Fish	Water, Ice	4, stronger than Pyrorunners without Plasma	~7,000 years
Aerorunner	2nd	Avian/Bird	Air, Sounds, Pressure	3, stronger than the lower two Forerunner Types	~5,000 years
Dendrorunner	1st	Rodent/Leporidae	Soil, Plants, Ores	0~1, weakest of the Forerunners	~1,000 years

Sibling Souls
Every Forerunner begins life as a Dendrorunner; and upon reincarnating into their second life as a Aerorunner, they form a Sibling Soul with the person they were closest to as a Dendrorunner, and will continue have this bond throughout the rest of their Forerunner life cycle.
Together they wield their full power, but the loss of a Sibling Soul leaves the other Forerunner permanently weakened.

Rampancy
Rampancy is the main type of corruption curse in Shadows Calling. It primarily infects Forerunners, making them lose their mind and become monsters.
Shadowrunners and Voidrunners are considered as predators because of Rampancy, and actively hunt and devour Forerunners with little to no corruption in the very fragmented mindset that they will return to "normal" again.
Some very powerful Forerunners can control their Rampancy, while others can recover from Rampancy with a small window of lucidity that can occur when a Forerunner's Sibling Soul/Soulmate is within their line of sight. However, their Soul-Bonded needs to stay in their line of sight to remain calm, and if they move out of sight, the other will go rampant again quite literally within seconds.
Rampancy goes far beyond even Forerunners; as when this corruption becomes too much, it can infect its surroundings and potentially corrupt the entire planet in the process. One planet in the solar system called Xytallier has already been corrupted to the point of uninhabitability for any creature to live in without a severe level of Rampancy corruption themselves.
It is said that Mother is located at Xytallier, trying to preserve the corruption.

Examples:

Nayrorei's Rampancy
Keyoji's Rampancy
Sim's (mild) Rampancy
Odin's Rampancy

Forerunner Eye Colors
Blue is the color of Aura; a life-force energy within all creatures. While Red is often associated with a level of Rampancy corruption. As a result of this, Forerunners commonly have red or blue eyes which compliment to their blood color as well. Forerunners' eyes glow when in high emotional distress or using their powers.
Some Forerunners do not have red or blue eyes at all, and may have an entirely different color overall. It is common in Dendrorunner as they are freshly developed, it very rarely carries onto a Forerunner's future lives; but if it does, they are significantly weaker than Forerunners with the basic red/blue eyes. The most common "off-color" eyes are Gold, Jade and Obsidian. Those with Purple eyes have a mixture of Red and Blue, though majority tend to have heterochromia this way.

Forerunner Eye Colors

Blue is the color of Aura; a life-force energy within all creatures. While Red is often associated with a level of Rampancy corruption. As a result of this, Forerunners commonly have red or blue eyes which compliment to their blood color as well. Forerunners' eyes glow when in high emotional distress or using their powers.

Some Forerunners do not have red or blue eyes at all, and may have an entirely different color overall. It is common in Dendrorunner as they are freshly developed, it very rarely carries onto a Forerunner's future lives; but if it does, they are significantly weaker than Forerunners with the basic red/blue eyes. The most common "off-color" eyes are Gold, Jade and Obsidian. Those with Purple eyes have a mixture of Red and Blue, though majority tend to have heterochromia this way.

Forerunner Factions
Creation Faction - a faction for Forerunners who wish to preserve and create for the solar system. Members actively go around the solar system to try and maintain Rampancy corruption that occurs throughout the solar system. There are two teams within this faction; the Adventure team and the Preservation team.
Abyssal Faction - a faction of Forerunners who disagrees with the Creation Faction; wishing to end everything that Mother had created and create a new world in the image of a false Primordial that corrupted her in the first place. They actively spread Rampancy corruption around the solar system to pry Mother out again.
Neutral - a Faction that prefers to keep out of the other two's business. They have their own planet called Solacea, which has a highly regulated entry policy.

Universe	There are a total of 8 planets in the solar system entailed in Shadows Calling
Verdar	a planet for the Dendrorunners, filled with beautiful fauna and a lustrous ecosystem.
Caelon	one of the smallest planets with no rocky outer layer and mantle. This planet is more like an archipelago of mini planets sharing one core for Aerorunners.
Thalassir	a planet completely devoid of surface; it is considered as a water planet appropriate to its Hydrorunner population.
Cindros	a planet closest to the sun, serving as the hottest planet appropriate to Pyrorunners, filled with active volcanoes and deserts.
Elysia	a planet similar to Earth (IRL) and appropriate to all Forerunners types; though, it does have very frequent storms.
Veil	the furthest planet from the sun and also serves as the coldest of the solar system. Eternally coated in darkness, this planet is perfect for Shadowrunners.
Solacea	the smallest planet in the solar system, serving as a safe place for all Forerunners. A place in which all Forerunners can meet in-between worlds.
Xytallier	the largest and most destroyed planet of the solar system; second furthest away from the sun and completely blocking any light that would reach Veil.

Androids
There are other Crystalian species other than Forerunners; with the main one being Androids, who live quite closely with their Forerunner companions.
They mostly serve Forerunners, while some are actually called "Companions" to their Forerunner partner. They are primarily used to be helpers for those of the Adventure Team of both Abyssal and Creation Factions, while those serving in the Neutral Faction are free to do their own thing.
Androids are made of the same Crystal as Forerunners, but lack the power to form a humanoid/beast form like Forerunners. They are often used to host Souls/Wisps of fallen Forerunners who have lost the ability to reform or form.

Vixi
Paro
Charum
Luuta & Ruuta

NSFW - DO NOT READ IF UNDERAGED OR UNCOMFORTABLE!
Forerunners are bigender, meaning they have both "male" and "female" anatomy. They can choose to repress some aspects like breasts or muscles, but they cannot change their genitalia; which is a vulva with a 30cm long prehensile, slimy penile organ that can exit and enter the body. It's "tip" differs between individuals.
Those with a tapered tip tend to be more reckless and energetic, while those with a blunt and rounded tip are more gentle, reserved and calming.
This prehensile appendage can fold inwards, creating a canal inside the Forerunner, somewhat creating a vagina with no cervix at the end of it. Most Forerunners keep their prehensile appendage like this to keep it slimy and warm; as it can easily dry out and create a lot of pain for the Forerunner if left dry. When a Forerunner gets "excited", this prehensile appendage can either fold outwards to create a penile form or remain inside and coat itself more with slime.
The "tip" at the end of the canal can inflate if there's too much fluid, and can block off entirely if the Forerunner decides to preserve fluids inside.