Capacity and Fate Ability System
This system explains how the powers possessed by humans and other beings function and what their limitations are. Essentially, Capacity determines the limits of power usage, while Fate Ability refers to innate, unchangeable special abilities unique to humans.
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1. What is Capacity?
Capacity is the limit of a being's power. A person or creature can increase their capacity, but it can never reach an infinite level. Capacity determines:
How powerful an ability can be
How long it can be used
How precisely it can be controlled
To understand capacity, we can use the water and container analogy:
Glass: Someone with low capacity. It fills up quickly but can only hold a small amount of power.
Bucket: Someone with greater capacity. It takes longer to fill but can store and use much more power.
However, what matters is not just how much water you have but how you use it. Even someone with low capacity can be effective by using their power efficiently.
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2. What is Fate Ability?
Humans cannot use capacity directly. Their only power comes from their Fate Ability. These abilities:
Are innate and unchangeable
Cannot be acquired or removed—once granted, they remain with the individual even after death, imprinted on their soul
Can only be used within the limits of their capacity
Types of Fate Abilities
A. General Fate Abilities (Common Abilities)
These abilities are shared by many individuals, often appearing in similar or identical forms.
They are simple and easy to understand, usually involving basic physical or direct effects.
As capacity increases, their power also grows, but their fundamental nature does not change.
Examples:
Physical Enhancement: Strengthens the user's body.
Muscle Strength Boost: Increases muscle power.
Endurance Boost: Enhances physical durability.
Double Strength: Instantly doubles the user's power for a brief moment.
While there may be slight variations between individuals, many people possess nearly identical abilities within this category.
B. Special Fate Abilities (Rare & Unique Abilities)
These abilities are extremely rare and unique to a single individual.
They often involve complex, unusual, or even illogical powers.
Examples:
Internal Combustion: Burns objects from the inside upon touch.
Internal Freezing: Freezes objects internally upon touch.
Time Stop: Temporarily halts time within the user's surroundings.
Rewind 5 Seconds: Sends the user back in time by 5 seconds.
Fast Forward 5 Seconds: Moves the user 5 seconds into the future.
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3. Capacity Usage and Ability Balance
Capacity Consumption Based on Ability Complexity
Simple abilities consume little capacity. Physical enhancements like muscle strength boosts can be used almost continuously, even with a low capacity.
Complex abilities require significantly more capacity. Abilities such as time manipulation or spatial distortion can only be wielded by individuals with an immense capacity.
If someone has a powerful but capacity-draining ability, they might be unable to use it effectively, making them appear as an ordinary person.
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4. Fate Ability Distribution Among Humans
80% of the population possesses a Fate Ability.
60% have General Fate Abilities.
20% have Special Fate Abilities.
20% of the population is completely ability-less. These individuals cannot access capacity or possess any special powers.
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5. Capacity in Non-Human Beings
Humans cannot use capacity directly, but for other beings, the situation is different.
Creatures such as dragons, demons, and werewolves can directly utilize capacity.
They do not possess Fate Abilities but instead grow stronger by increasing their natural capacity.
As their capacity grows, so does their power.
Examples:
A dragon is born with the ability to breathe fire. However, as its capacity increases, its flames become more powerful—perhaps even transforming into an eternal fire.
A demon can enhance its healing speed, reflexes, or even evolve into new forms as its capacity expands.
A werewolf becomes more resilient and undergoes stronger evolutions as its capacity grows.
For humans, Fate Abilities define their strength. But for other beings, capacity is the key to their natural growth and power.
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Author's Note
This document provides the fundamental framework of the power system. However, the world is far deeper and more complex than what is outlined here. The mechanics of capacity growth, ability evolution, and much more will unfold as the story progresses. Get ready to explore!