Essa
Physical fuel extracted from the earth, refined into vials, and burned to produce force effects. Eight tiers. One Burn Track. Infinite consequence.
What Is Essa?
Essa is not mana. It is not a spell slot. It is physical fuel — extracted from the earth, refined into vials, and burned to produce force effects. The Feedback / Burn loop exists because channeling Essa is a transaction with consequence. Every activation is a decision made against a real cost. Spend recklessly and the system pushes back.
History
Before the Pulse Wars, Essa was distributed through the ley line network — a planetary-scale infrastructure designed by pre-Pulse engineers. The wizard houses exploited this network for magical arms production. The Thirteen Shifts were ley line rupture events: when a nexus failed, it failed catastrophically. The current age runs on refined Essa extracted from the bones of a world whose original energy architecture was broken and whose replacement infrastructure is controlled by whoever can afford to build refineries.
Current State
The Godkiln in Corvath produces the first stable refined Essa — AI 0 is the year this succeeded. The Empire built its entire economy around control of Essa production and licensing. The Suppression Grid monitors and logs Essa use across all citadel territories. The Shatterds trades in black-market vials and unlicensed Rig work. Every subclass ability, every powered weapon and vehicle, every Technique runs on Essa in one of its eight documented grades.
How Essa Works
The Burn Track
When a Feedback Save fails, the character gains Burn — cumulative stress on body or Rig. Burn is a slow escalating punishment that rewards discipline and punishes recklessness.
Clearing Burn: Burn reduces by 1 on Short Rest. All Burn clears on Long Rest. T4 Core-grade Essa purges 1 Burn level as an Action. T5 Whitefire users are immune to Feedback and Burn entirely.
Burn Buffer
Rigs absorb Burn before it reaches your body. When you would gain Burn, mark it on the Rig buffer first. If the buffer is already full, the Burn goes to you.
Channel Slots
Channel Slots are spent only when activating a Reaction Technique. Action and Bonus Action Techniques cost vials only — no Channel Slot consumed.
All Channel Slots recover on Short Rest or Long Rest. Subclasses with no Rig (The Still, Ironhand, Rawcaster) do not have Channel Slots unless specifically noted in their subclass entry. These subclasses manage Reactions through different mechanics.
Technique Categories
Every Essa Technique belongs to one of eight categories. Your subclass entry lists exactly which Techniques you have access to and when you unlock them.
The Suppression Grid
The Empire maintains a network of Essa-sensing infrastructure across its citadel territories called the Suppression Grid. The Grid does not block Essa use — it detects and logs it. Operating without a registered Rig in a Grid-active zone is a criminal offense under Empire law.
In Grid-Active Zones (Major citadels and Empire-controlled cities.)
- Unregistered Rig use generates a detection event.
- Licensed Rigs with valid registration are logged but not flagged.
- Essa-invisible practitioners (Ironhand, The Still) do not appear on Grid readings at all — their channeling produces no Essa signature.
- Signal Dampener Rig modifications reduce your Grid visibility by one tier.
Response times: Minor events — 1d6 hours for minor events (low-tier, single activation). Major events — 1d4 rounds for major events (T4+ Essa use, wild channeling, unlicensed discharge in public).
Outside Grid-Active Zones (The Shatterds, wilderness, and Independent citadel territories.)
- The Grid has no reach outside Empire-controlled zones.
- Essa use produces no detection events.
- This is why most unlicensed practitioners operate out of the Shatterds.
The Rig System
A Rig is the hardware that channels Essa. Without it, Essa has no routing infrastructure. Most subclasses require a Rig — losing it is a class-defining vulnerability, not an equipment inconvenience.
Essa Vial Tiers
The waste product of Essa refinement. Viscous, unstable, and nearly useless as fuel. In raw form it burns dirty and dim — adequate for cheap torches and street-vendor heating. The converted castable form is illegal everywhere the Empire has jurisdiction.
The baseline. Minimally refined Essa stable enough for civilian use and combat-grade channeling at low output. Dull amber-gold in color. Barely reactive. The working fuel of most practitioners in the Shatterds — cheap enough to carry in quantity, potent enough for standard Technique activations.
Refined to combat-stable grades. Can power mid-tier class features and standard Rig features with enhanced output. The baseline for anyone operating professionally outside civilian infrastructure.
The standard Leviathan-yield product of a working refinery. Noticeably brighter — deep amber with gold striations visible under pressure. The backbone of the Shatterds black market. Requires credentials to purchase legally; available underground to anyone who knows who to ask.
Significantly restricted. Pale gold with visible internal luminescence that does not require external light. A Core-grade vial glows in the dark. Purges 1 Burn level as an Action when consumed by an attuned user.
Empire-controlled monopoly. Pure white luminescence. Users attuned to T5 Essa are immune to Feedback Saves and the Burn Track entirely — their channeling architecture has been reshaped at the biological level. The Empire issues this only to licensed Essa Knights and Church of Flame Paladins.
Effectively inaccessible under normal conditions. Black with internal luminescence that shifts through the full color spectrum. Contact with organic matter produces anomalous effects that resist classification. Pre-Pulse experiments with T6 were discontinued for reasons the Serak Vault records do not fully specify.
Achieved once in recorded history. The Essa output of a functioning Progenitor-level ley line nexus at full capacity. No sample exists. No method of production exists. What it does is recorded only in Serak Vault archives and in the fact that the Progenitors used it to terraform a planet.