Skills

Skills are any ability an individual can exercise. When acquired it can be instinctively used, but still requires hard work to evolve it.

Information
Skills are divided by their activation or function. Super-Categories are defined by their cost, if they don't expend ATT they are passive, if they do, they are Active. Categories further divide Skills by their main area of effect, with Sub-Categories existing to specify a bit more. Skill Types are what divide by use of function, with Sub-Types existing when there are broad applications.

Skill Tree
A hierarchical correlation between every Skill, starting from the top, and branching downward. If a Skill is lower than another it's its Sub-Skill, while a higher one is its Super-Skill.

Passive
Skills that don't require any cost to use. Therefore their effect remain as Status or Attribute modifiers.

Knowledge
Skills that are focused on Non-Combat applications. They are particular in the way that leveling their Tiers give out XP. "$Skill+ = 1000\ Skill_{Uses} = +Skill_{Tier}\ XP$"

Original
Talents that are Passive.

Active
Skills that require HP or MP to activate. They have a more direct effect on the environment.

Martial
Skills that use HP to activate. When a particular Martial Skill has multiples uses, these are called Techniques. Almost all Techniques have a standard cost/effect: "$-Skill_{Tier}\ HP\ :\ +1.5*Skill_{Tier}\%\ ATK$"

Magic
Skills that use MP to activate. When a particular Magic Skill has multiples uses, these are called Spells. Almost all Offensive Spells have a standard cost/effect: "$-1.5*Skill_{Tier}\ MP\ :\ +5*Skill_{Tier}\%\ ATK$"

Unique
Talents that are Active.

Tiers
Instead of levels, skills have Tiers that go from 1 to 10. Once a Skill reaches 10 it can level no further, instead allowing direct access to a higher form of the Skill, while still have requirements to unlocking it. A higher form of a Skill is called a Super-Tier. For Martial Sills their Super-Tiers are: "Art &rarr; Craft &rarr; Mastery" For Magic Skills: "Basic &rarr; Intermediate &rarr; Advanced"

Leveling
To progress a skill further it is required frequent use. For mosts skills: "$Skill+=100*Skill_{Tier}\quad Skill_{Uses}$" For Magical Skills: "$Skill+=33*Skill_{Tier}\quad Skill_{Uses}$" Like LVL leveling, Skills can be leveled-up by consuming XP: "$Skill+=-5*Skill_{Tier}\quad XP$"

Unlocking
Skills can only be acquired by the following methods: When unlocking a Sub-Tier Skill it's only a matter of expending 10 XP. While unlocking a Super-Tier Skill would be the same as leveling a Tier, it requires not $$5*Skill_{Tier}$$, but $$10*Skill_{Tier}\ XP$$.
 * Race: If a subject belongs to a certain Race, they can acquire their inherent Skills;
 * Job: If a subject acquires a Job they gain its signature Skills;
 * Items: Certain Items can have Skills implanted in them;
 * Equipment: When using it the Skill is unlocked;
 * Consumables: Low-grade ones give a singular or limited use, while High-grade ones can give it permanently;