Skill

In brief, a Skill is a magical power a person has, with three types in total. There are Elemental, Unique, and Unknown.

Description
A Skill is a element of power that one person has. These supernatural powers co exist with everything else in the world.

Signs & Appearance
Skills are always somewhat active or "passive" but can be fully activated consciously or unconsciously if the skill itself reacts. If the skill is flashy then the user's hair color will have the same color as the skill. The user's skill color will also show an aura when mana is being used, growing bigger the more mana is being outputted. However, people can only sense the aura and cannot see it. Those who can see it are the ones who are reading.

Mana & Aura
Skills uses up mana stored within the user, and gives off an aura when mana is emitted. The aura can grow more in size and intensity the more mana is being used from the user. There are many types of mana such as negative mana, distorted mana, and etc. Aura can also be manipulated for only a few reasons.

Usage
Most people use their skills in a simple way such as basic moves and techniques. But many can manipulate their skills and create new techniques which are more powerful and complex. If the user has more than 1 skill, they can combine techniques and move sets with each other.

Obtaining Skills
People are born with Skills but they only manifest into something of use when the user is in late childhood (with few exceptions). When it comes to people without a Skill, there seems to be nobody confirmed with no powers. The closest one was a person with its skill limited to input and cant output any mana or aura. It is also possible to develop a 2nd Skill but it takes a lot more practice and refinement to complete creating it. High skilled users are the most common to have a 2nd skill, and is very rare for everyone else.

Skill Types
Skills are categorized within 3 types from most common to least common, which are Elemental, Unique, And Unknown. All three are very similar but organized due to major differences.

Elemental
Elemental type skills are the most common and basic type of the 3. These skills uses the basic and simple elements such as fire, ice, water, earth, dark, and light. They can also branch out from the basic elements such as Black Magic, Color, and etc. Elemental skills are most commonly greater in strength and defense against unique skills.

Unique
Unique type skills are more rare and complex than elemental skills. These skills use more complicated moves and techniques which are better for strategy. Many examples for this are telekinesis, absorption, and etc. Most of the time these skills are weaker in strength and defense but its complexity is it's trade off.

Unknown
Unknown skills are the rarest and most complicated type of skills. They're a theory created by the government where there are skills that can manipulate the quantum space and time, and can go beyond human limits in power. There is currently nobody in the world confirmed to have an unknown skill. Unknown skills can have the properties of both elemental and unique skills but in a greater level. Unknown skills are the most feared type that society sees as. It isn't able to be identified with normal identification systems as it is not classified as an actual skill and the complexity of the unknown skill is too much for them to handle.

Complexity
This aspect is used to determine whether a skill is a elemental type or a unique type. Unlike the others, this cannot be determined by a machine but by another person in a procedure. To be classified as unique, the skill would have to me much more complicated whether in material or usage. Any skills that are somewhat complex or simple would be classified as elemental.

These tests/aspects determine the skill, skill type, and level of the Skill and its tier within the power scale. "To read more about tiers and levels, click on this link."

Limitations
While the skills themselves can be very powerful to the point that it can destroy cities, the users of the skills are incapable of passing the limits of their power before they would kill themselves from it. The only way to use the full extent of skills is by breaking the limitation barrier, a barrier that limits the person's usage of their skill.

Origins
There are no confirmed origins to how skills ever came into the world.