Field Manual · § 1
Light, and the other kind
Ohr — אור — is light, and the word is not a metaphor that somebody in requisitions got carried away with. Every Seraphim machine you will ever touch runs on it, and the reason they run on it and not on something more convenient is the whole quarrel of this war.
What it is
You do not burn Ohr. You cannot make more of it by wanting more of it, and
you cannot pull it out of the ground the way the old world pulled its
power out of the ground. It is grown — in a
Crystallizer , out of Shefalite and living
matter and time, which is why a complex that is producing well smells
faintly of soil and why the growing halls are next to the farms.
That is inconvenient and it is deliberate. A power source that has to be cultivated cannot be seized in one raid, cannot be scaled without people tending it, and does not reward the thing the enemy is best at. Metatron has been asked more than once for something faster. The answer has not changed.
Fuel
| Source | Ohr | Notes |
|---|---|---|
 Ohr Capsule | 200 | The standard. Grown in a Crystallizer, clean, and the only thing on this list you should be building a supply chain around. |
 Sitra Capsule | 150 | The enemy’s. Worth less per capsule and runs a Fabricator half again as fast. Read § 3 before you decide that is a good trade. |
 Graphene Cell | 100 | Portable storage. What you carry, not what you run a base on. |
| Ordinary fuel | 2–50 | Coal, wood, whatever you have. It works, barely, and it is in the table so that nobody has to find out the hard way that it is not a plan. |
Your own buffer
You carry Ohr. Not in a pack — in you. Hold a filled capsule, look at nothing in particular, and take it; it goes into an internal reserve that tops out at five hundred, which is five capsules, and which is what every weapon ability you own draws on.
The buffer survives your death. This is the single most quietly generous thing the complex does for its operatives and nobody explains why, though everyone has a theory. Fill it before you go out. An ability with an empty buffer does not degrade gracefully; it simply does not happen, and it tells you so at the moment you needed it.
Buffer
capacity 500 · five capsules
Shown at the top right of your interface whenever it is not empty. Sitra fills it too. Sitra fills it at a price.
Sitra
Sitra is Ohr that has been through the enemy. It comes back denser, quicker to release, and better in every respect you can put a number on — a Fabricator fed on Sitra works half again as fast, and there is no version of this manual that pretends that is not attractive.
It is not forbidden. Nobody will stop you, and the complex issues a
Purifier precisely because it expects you
to have some. What it does is not immediate, it is not obvious for a long
while, and past a point it is not reversible. Section three is about that
and does not soften it.
The machines
| Machine | What it is for |
|---|---|
| Crystallizer | Grows Ohr out of Shefalite and living matter, slowly, while you are elsewhere. Build one early. Operatives who do not spend their careers rationing. |
 Fabricator | Everything past a bench. Takes Ohr as fuel and turns the base materials into the ones worth having. |
 Ohr Tank | Bulk storage. A tank near a Fabricator is the difference between working and fetching. |
| Purifier | Turns Sitra back into something clean, at a loss. The loss is the point. |
 Shekhinah Dock | Charges a Shekhinah while it is not with you, which is the only time it will let you. |
 Metatron Terminal | A relay. Shows you your own Tree, and is as close to Metatron as almost anyone gets. |
The chain
Everything begins in the same place. 
Shefalite Crystal comes
out of the ore — thickest deep down, better odds in deepslate — and a common
furnace makes it 
Shefalite Ingot , which is the black metal
underneath every Seraphim object in existence. Coal pressed into
Graphene Sheet is how anything here holds a charge. Put
the two together in a Fabricator and you get
Seraphic Steel Ingot , and from there the tree opens and
does not close again.
And God said, Let there be light: and there was light. Genesis 1:3