Note: This auxiliary chapter can be seen as spoilers, so if you want to go in blind and without knowing anything, do NOT read this.
Seriously.
Remember my warning.
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Tiers of the Supernatural:
Low Tiers: Barely supernatural, mundane with weak supernatural abilities. Usually only has the Source Element.
Nascent
Neophyte
Awakened - Nearly a true supernatural.
Mid Tiers: True supernaturals, enhanced bodies (e.g. running speed, lifespan etc.), supernatural capabilities etc. Their Secondary and Tertiary Affinities become realised.
True
Beyonder (Technically LOTM reference)
Ascender
High Tiers: Powerful supernaturals capable of breaking practically any natural law to some extent. Greater physical and supernatural capabilities, better looks etc. Their Affinities can combine to create unique effects.
Master / Praeterial (Praeter is the technical term usually used for beasts & monsters)
Elite / Great (Great is the technical term usually used for beasts & monsters)
Champion / Transcender (Transcender is the technical term usually used for beasts & monsters)
Top Tiers: The very peak of what a creature can become. Unique, powerful and impossible to mass produce.
Interim - Interims begin to make themselves unique, often going decades or centuries without any rise in power before suddenly rising in power in extreme amounts.
Prime - Every Prime is unique. They do not age. They are limited solely by things like the Equaliser.
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Power System:
Essence - Everything has Essence. Everything has 10,000 notches of essence reach of which represent 0.01% of their total essence amount. Rising in the tiers of the supernatural raises the value and quality of essence.
Affinities - Affinities are the things that determine what your essence is capable of. People usually have over a dozen Affinities, but only their Source Element, Secondary and Tertiary Affinities are useable. There are common and uncommon Affinities without any direct difference in power, and Rare Affinities which are inherently superior.
Traits - Passive abilities that are either Physical, Mental or Supernatural.
Innate Traits - Active ability skillsets. A person can only have one.
Evolution Traits - Rare transformation abilities. A person can have one.
Skill Sequences / Skill Branches - THESE ARE NOT CLASSES! Almost every supernatural (except very few) has multiple. Skill Sequences are literal skills that are learned from SS Guide Books. Mid-tiers onwards, they grant supernatural abilities as well e.g. Navigator lets you always know where NSEW is. They are split into 9 different Skill Trees: Constructive, Productive, Cognitive, Analytical, Mobility, Commanding, Performative, Sorcery, Combat (& Partial Combat).
Spells - Spells are the simple direct use of essence to create an effect.
Sorcery - Sorcery is the indirect use of essence to create and effect, has many different variants useable by anyone.
Power Natures - Power Natures are the things that hold the supernatural power inside everything, similar to Beyonder Characteristics. Get ejected out of the body when a supernatural dies. Can be used to advance faster, but consuming a PN that has Affinities different from or contradicting your Affinities is a death sentence. Each Power Nature can only have one Source Element. Deviants can have multiple Power Natures.
Spirits - Souls cannot be harmed or effected. Spirits are usually seen as the manifestation of the soul. It holds the essence of a living creature.
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Other (Supernatural) Info:
Humans - Creatures that evolved (originated) from Valls, the first "human" creatures.
Beasts - Non-human supernatural creatures that can be tamed or reasoned with.
Monsters - Non-human supernatural creatures that cannot be tamed or reasoned with under normal circumstances.
Demons & Devils - Any creature that is Corrupted (by the Corruption) is a demon. They are pure evil, no exceptions. Devils are high and top-tier supernatural demons.
Law of Absent Absolutes - Nothing in the Grada can be absolute, no creature and no law. Anything that is contained within the Grada can ever be absolute or truly limitless/boundless.
Equaliser - Supernatural constant which sets an upper limit on supernatural (and non-supernatural) power. This is the reason why characters moving at the speed of lightning don't instantly ionise or evaporate their bodies for example. Applies to everything.
Divinity - Nothing in the Grada, no creature, no item, absolutely nothing is divine. None of my characters are Gods, they are not "Demi-Gods" etc. and should not be treated as such. Same thing applies to Angels. My Eldritch characters aren't Gods either, NOTHING is.
Rituals - Actions and achievements hold power, literal and metaphorical. A ritual is using this concept intentionally. Required for Major Tier advancements (Low->Mid etc.) and Minor Tier advancements after the mid-tiers (high-tiers onwards).
Reincarnation etc. - Reincarnation, Transmigration etc. exist in various different ways and do happen kind of often, though not commonly.
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Worldly info:
Grada - Everything. The world, the name of the world.
Inner Worlds - Inside of the World Tree. The Omniverse/Multiverse. Largely irrelevant.
Core Worlds - The immediate surrounding realms of the World Tree. The Grand Sectors, Boundary of Life and Death, Underworld, Abyss.
Outer Worlds - The Cosmos. Less supernatural than the Core Worlds.
Grand Sectors - The 13 gargantuan realms on the 13 major branches of the World Tree that appear as islands. (12 is incomplete as I write this.)
Boundary of Life and Death - The realm at the base of the World Tree.
Underworld - The first realm below the World Tree. This is where spirits usually end up after death, but rarely. This is not hell, nor is it the afterlife. It is a titanic cavern.
Abyss - The realm below the Underworld. Realm of the Forgotten.