Recorded
Two people throw fire. Why is one Elemental and one Arcane?
Because the classification is the source, and the source shows itself in whether there is a middleman.
An Elemental does it directly. The fire is an extension of them — created or commanded as naturally as moving a hand, with nothing standing between the intent and the flame.
An Arcane goes through something to get there. A spell, a study, a pact, an influence: a set of instructions older than the caster, which obey their own rules and would obey them for somebody else too. The sorcerer flinging ghost-fire is not an elementalist, because they are not making fire or ruling it — they are summoning it. The fire is borrowed, and the terms of the loan were written by someone else.
If lustre is the imperative, then imperatives come with instructions. Arcane is the power type where you can still see them.
Recorded
Then how is Harmonic not just Arcane by another name?
Both are earned by practice. That is the entire resemblance, and it is why they get confused from a distance.
Arcane is magical discipline. What is being studied is a body of magic that exists whether the practitioner does or not — rules older than the caster, which would answer to anybody else who learned them properly. The mastery is of something external, and it can be written down.
Harmonic is spiritual discipline. There is no external corpus and no rite that works for the next person who reads it. Nothing is being studied except the self; the practitioner becomes the instrument, and the instrument does not transfer.
One is yoga. The other is witchcraft. Both take years and both reward patience — only one of them leaves a book behind.
Recorded
Cosmic, Divine, Abyssal — if all three are non-terrestrial, what separates them?
Cosmic is an address. Divine and Abyssal are directions.
Cosmic means the source is off this world, or too vast for this world to have produced it. Verdigris is a planet. Somewhere out there is a place, and the power came from it. That is all Cosmic claims.
Divine is power drawn from the high threshold — what the religious would name holy. Healing that has no business working. Intervention. Turning the dead. Defence against what should not be defended against.
Abyssal is drawn mostly from the low threshold, and from the things that dwell there. Death, the demonic, the cursed, the corrupt.
So a being from a distant planet reads Cosmic no matter how strange it is, and a being from the high threshold reads Divine no matter how near it stands. The thresholds are not far away. They are a different way through.
Recorded
What actually makes a power type Genetic?
Genetic means the genes are different from a regular member of that species. Not different from a human — different from what that person's own kind normally is.
This is why Patina is not Genetic. Flight, strength, speed and durability are standard Verdigran equipment; she is not an abnormal Verdigran, she is an ordinary one standing on the wrong planet. Alien anatomy has never made a power type Genetic on its own. The question is only ever whether someone is unusual for their own species.
Genetic also pairs freely. A pyrokinetic mutant reads Genetic · Elemental: the genes say where it came from, the fire says what it is. It works the same way anywhere else on the list — a summoner who can only ever call elemental avatars reads Arcane · Elemental, method beside domain.
Recorded
Then why does every Genetic in the cast also read Dynamic?
Coincidence of temperament, not a rule. Argent, Rubicore and Dashlight all read Dynamic · Genetic because unnatural genes and hard-to-classify abilities travel together — when the body has been rewritten, what comes out of it tends not to have a shelf waiting for it.
Dynamic is not a component of Genetic and Genetic does not imply Dynamic. A solo Genetic is entirely possible, and so is Genetic beside any other power type. The pairing is common, not compulsory.
Recorded
How can something built be a power type at all?
It is not the built thing. That is the whole answer, and nearly everybody gets it backwards.
Mechanical is the capacity for technology — to build it, to harness it, or to take it to a limit nobody else could reach. The machine is not the lustre any more than a painting is the painter. It is what the lustre produced.
So the power type belongs to the engineer whose work has never once failed, not to the workshop. Strip her of every tool she owns and the ordainment has not moved an inch; she is simply a person who currently has nothing to show for it. Give the same tools to somebody else and they are a person with tools.
Lustre is not a power, and this is where that distinction earns its keep.