Manipulation of sound, heat, and harmonic resonance. Pyrosonics practitioners channel thermal energy and acoustic vibrations through the Weave, creating destruction through frequency or temperature extremes.

Pyrosonics resonates with the kinetic and thermal layers of the Weave—the quantum vibrations of particles in motion. Practitioners perceive reality as a symphony of frequencies, where every object has a resonant signature that can be amplified or shattered.

Pyrosonics was likely discovered mid-timeline (discipline 4 of 9), after survival needs but during the period when carriers explored combat and destructive applications. The discipline probably emerged from observing thread interactions with fire, sound, and vibrations.

Accidental Weaponization

Thread carriers likely noticed their threads could make objects hot without fire, vocal commands could shatter glass if spoken "wrong," certain hand motions created pressure waves, and resonance between threads and materials causing vibrations.

Post-collapse violence (raiders, territorial disputes, dangerous creatures) drove development of combat disciplines. Pyrosonics became the premier offensive discipline.

Cultural Significance

In Weaver culture, Pyrosonics practitioners are called "Resonants" (respectful), "Burners" (common), "Shatterers" (combat-focused), or "Songbreakers" (poetic reference to harmonic destruction).

Traditional sayings:

• "Every object sings; every song can break."
• "Heat without fire, sound without voice, death without touch."
• "The resonant frequency of hubris is always fatal."

Pyrosonics has a martial, dangerous reputation. Many societies require licensing and restrict teaching. Military organizations employ master Pyrosonics for combat. Forge Masters use controlled heat for metalworking. Shadow Syndicate trains acoustic assassination techniques.

• Thread Color: Orange-red to crimson (heat), or visible sound ripples
• Glyph Patterns: Wave forms, oscillating patterns, thermal blooms
• Manifestation: Heat shimmer, visible shock waves, resonant distortions, flame-like energy

• Thermal Projection: Generating intense heat or flame without combustion
• Sonic Weaponry: Creating destructive sound waves or focused acoustic force
• Harmonic Destruction: Finding and exploiting an object's resonant frequency to shatter it
• Temperature Regulation: Heating or cooling spaces, objects, or bodies
• Acoustic Sensing: Using sound reflection to map environments
• Frequency Jamming: Disrupting other Weavers' vocal commands through harmonic interference

Pyrosonics manipulates phonons (quantized vibrational energy) and their coupling with plasmonic cavities. Threads create plasmon-phonon hybrid modes, enabling direct control of thermal and acoustic energy at the quantum level.

Heat generation works by exciting phonon modes in materials, while sonic weaponry exploits acoustic resonances. The "resonant frequency" of objects is their natural phonon spectrum, which can be amplified to destructive levels through strong plasmon-phonon coupling.

Function: Generates concentrated heat at target point, raising temperature from ambient to ignition point of flammable materials. Can start fires, cauterize wounds, or provide warmth. Heat appears instantly without flame.

Duration: Brief heat spike (1-5 seconds) or sustained low heat (minutes)

Thread Cost: Low-Moderate (5-10% for brief ignition, 15-20% for sustained heating)

Applications:

• Fire-starting (campfires, forges, lighting)
• Cooking (instant heat without fuel)
• Cauterization (emergency medical wound sealing)
• Signaling (smoke signals, beacons)
• Warmth (personal heating, cold weather survival)

Safety Warning: Uncontrolled ignition can cause wildfires, building fires, or burns.

Function: Generates directed sonic pulse—concussive sound wave that can knock back targets, shatter fragile objects, or create disorienting noise. Intensity ranges from loud clap to deafening blast.

Duration: Instantaneous pulse (sound propagates then dissipates)

Thread Cost: Low-Moderate (8-15% depending on intensity)

Applications:

• Combat (knockback enemies, create distance)
• Breaching (breaking windows, doors)
• Crowd control (dispersing groups)
• Signaling (alarm, warning shot)
• Rescue (clearing rubble, alerting rescuers)

Safety Protocol: Echo can cause permanent hearing damage, concussions, or internal injuries if excessive.

Function: Raises or lowers temperature in defined area (3-5 meter radius) by moderate amount (±20°C). Can warm cold spaces, cool hot areas, or maintain comfortable temperature.

Duration: Temporary (sustained concentration, minutes to hours depending on thread investment)

Thread Cost: Moderate (12-20% reserves for 1-2 hours of moderate temperature shift)

Applications:

• Climate control (comfort in extreme weather)
• Food preservation (cooling perishables)
• Medical (fever reduction, hypothermia treatment)
• Industrial (process temperature control)
• Camping/survival (warmth without fuel)

Function: Enhances hearing to detect distant sounds, quiet noises, or specific frequencies. Can isolate particular sounds from background noise (conversation in crowd, heartbeat, footsteps).

Duration: Temporary (sustained concentration, typically 5-30 minutes before mental fatigue)

Thread Cost: Low-Moderate (8-12% reserves for 15-30 minutes)

Applications:

• Surveillance (eavesdropping, reconnaissance)
• Hunting (detecting prey by sound)
• Search and rescue (hearing calls for help, survivors)
• Security (detecting intruders)
• Medical diagnosis (hearing internal body sounds)

Function: Finds and exploits object's resonant frequency to cause structural failure—shattering glass, cracking stone, breaking bonds. Works on brittle materials best.

Duration: Brief resonance excitation (2-10 seconds until break)

Thread Cost: Moderate (10-20% depending on object size and material toughness)

Material Difficulty:

• Easy: Glass, ceramics, crystal (brittle, single resonance)
• Moderate: Stone, concrete, bone (brittle but complex)
• Hard: Wood, plastic (partially ductile, dampens vibrations)
• Very Hard: Metal (ductile, multiple resonances, energy dissipation)

Ethical/Legal Status: Shatter is destructive magic—using it on others' property without permission is vandalism.

Function: Creates barrier that blocks or redirects sound and heat. Can protect against sonic weapons (including other Pyrosonics practitioners), muffle conversations, or insulate from temperature extremes.

Duration: Temporary (sustained concentration, typically 10-60 minutes)

Thread Cost: Moderate (15-20% reserves for 30 minutes of protection)

Applications:

• Combat protection (defending against Pyrosonics attacks)
• Privacy (muffling conversations)
• Insulation (creating comfortable microclimate)
• Sleep protection (blocking noise in loud areas)

Limitations: Blocks sound/heat but not light or physical matter. Does not replenish air (prolonged use in sealed space causes suffocation).

Function: Rapidly extracts heat from target area, dropping temperature and extinguishing fires. Can cool overheated objects, prevent ignition, or create localized cold spot. Opposite of Ignite.

Duration: Brief cooling burst (2-5 seconds) or sustained cold (minutes)

Thread Cost: Low-Moderate (8-15% depending on heat intensity and duration)

Applications:

• Firefighting (extinguishing blazes)
• First aid (cooling burns, reducing fever)
• Food preservation (rapid cooling, preventing spoilage)
• Industrial (heat treatment, metalworking quench)
• Combat (countering enemy Ignite, preventing traps)

Function: Creates and controls actual flame—self-sustaining fire that consumes fuel but directed by practitioner will. Can shape fire into walls, projectiles, or artistic forms.

Duration: Sustained (as long as fuel available and concentration maintained)

Thread Cost: High (30-50% reserves for significant fire creation and control over 5-10 minutes)

Ethical/Legal: Heavily regulated as dangerous weapon. Prohibited in many civilian contexts, requires advanced certification. Accidental fires causing death carry murder charges.

Applications:

• Combat (fire weapons, area denial)
• Demolition (controlled burns, structure removal)
• Forging (controlled heat for metalwork)
• Spectacle (entertainment, ceremonies)

Function: Creates zone of absolute silence within 20-meter radius. No sound can enter or exit the zone—complete acoustic isolation.

Duration: Sustained (5-20 minutes)

Thread Cost: Moderate-High (25-40% depending on zone size and duration)

Applications:

• Stealth operations
• Private conversations
• Protecting against sonic weapons
• Creating safe zones from noise pollution

Limitations: Also prevents caster from making sound, can be disorienting, extended use causes hearing sensitivity issues

Function: Identifies resonant frequency of target object and generates matching vibrations to cause structural failure. Can shatter glass, crack stone, collapse buildings, or rupture organs.

Duration: Instantaneous shattering or sustained vibration (seconds to minutes)

Thread Cost: Moderate-High (25-45% depending on target size/density)

Ethical/Legal: Classified as weapon, heavily regulated, illegal in civilian contexts

Applications:

• Demolition, breaking locks/barriers
• Combat (rupturing organs)
• Mining, rescue operations (controlled collapse)

Function: Creates point of extreme localized heat—up to 2000°C in fingertip-sized area. Can melt metal, weld, cauterize, or cut through materials with precision.

Duration: Sustained (seconds to minutes)

Thread Cost: Moderate (20-35% depending on temperature and duration)

Applications:

• Metalworking, welding, cutting
• Cauterization
• Lock-breaking, precision demolition

Risks: Can cause severe burns to caster if focus slips, fire hazard, extreme heat can damage threads

Function: Removes thermal energy from target, lowering temperature rapidly. Can freeze water, cool objects, induce hypothermia, or create ice. Acts as quantum heat pump.

Duration: Active cooling (seconds to minutes depending on target mass)

Thread Cost: Moderate (20-30%)

Applications:

• Medical (reducing fever/inflammation)
• Food preservation, creating ice
• Fire suppression
• Combat (hypothermia)

Limitations: Heat must go somewhere (thermodynamics), extreme cold damages threads, requires constant heat source

Function: Uses sound waves to map environment in detail, like sonar/echolocation. Can "see" through walls, locate hidden objects, detect movement, create 3D mental map even in darkness.

Duration: Active scanning (sustained as needed)

Range: 100-meter radius

Thread Cost: Low-Moderate (15-25% for continuous scanning)

Applications:

• Navigation in darkness
• Detecting hidden enemies, finding secret passages
• Search and rescue, mapping unknown terrain

Limitations: Acoustic dead zones, soft materials absorb echoes, mentally taxing, some materials block ultrasound

Function: Matches and controls vibrations in environment—can silence specific sounds while allowing others, tune musical instruments perfectly, synchronize machinery, or disrupt enemy sonic attacks.

Duration: Active control (sustained minutes to hours)

Thread Cost: Moderate-High (25-40% depending on complexity)

Applications:

• Selective noise cancellation
• Perfect musical tuning
• Countering sonic attacks
• Mechanical synchronization
• Acoustic camouflage (canceling own sounds)

Limitations: Can only handle limited number of simultaneous frequencies, requires continuous concentration

Function: Superheats matter into plasma state (ionized gas)—fourth state of matter beyond solid/liquid/gas. Creates contained plasma for cutting, welding, energy projection, or devastating plasma weapons. Can reach temperatures matching stellar cores (15 million Kelvin).

Thread Cost: Extreme (70-85%, scales with temperature/volume)

Applications:

• Cutting through anything (plasma torch)
• Devastating ranged weapons
• Materials science (plasma forging)
• Demolition
• Battlefield area denial

Limitation: Containment failure catastrophic (uncontrolled plasma explosion), requires constant thread drain, line-of-sight only, extreme heat risks self-immolation, forbidden in civilian contexts.

Function: Identifies target's resonant frequency then amplifies it to catastrophic levels, causing violent structural disintegration. Works on any solid object—buildings explode, armor shatters, weapons fragment, bones break. "Brown note" on steroids—finding frequency that destroys anything.

Thread Cost: High (50-70% depending on target size/durability)

Applications: Demolition (collapsing buildings), anti-armor (shattering defenses), assassination (rupturing organs via bone resonance), siege warfare, structural sabotage.

Ethical Catastrophe: Resonance Cascade works on living bodies—can shatter bones, rupture organs, liquify brain tissue by matching biological resonant frequencies. Classified as inhumane weapon, forbidden under war crime conventions.

Limitation: Requires analysis time (seconds to find resonance), some materials resist (dampened/adaptive structures), practitioner must maintain precise frequency (exhausting), collateral damage extreme, war crime if used on living beings.

Function: Creates zone of absolute silence by generating destructive interference for all sound waves. No sound enters or leaves null-zone—complete acoustic isolation. Can silence explosions, eliminate alarm systems, or create tactical dead zones where communication/coordination impossible.

Thread Cost: Moderate-High (35-55%, scales with zone size)

Applications:

• Stealth (silencing footsteps/equipment)
• Tactical (preventing enemy communication)
• Defense (neutralizing sonic weapons)
• Privacy (conversation security)
• Research (acoustic isolation chambers)

Side Effects: Total silence psychologically disturbing (humans rely on ambient sound), disorientation, tinnitus when leaving zone, communication within zone impossible (lip-reading/hand signals only).

Limitation: Only blocks sound (other senses unaffected), zone boundary visible as shimmer, skilled Pyrosonics practitioners can detect/break null with overwhelming sonic force, sustained thread drain.

Function: Transfers thermal energy from one location to another instantaneously—freezing one area while superheating another. Can drain heat from enemy weapons (causing malfunction), superheat armor (cooking occupant), or create extreme temperature differentials for tactical advantage.

Thread Cost: Moderate (30-50% depending on temperature differential and distance)

Applications: Targeted heating/cooling, weapon disruption (freezing firing mechanisms), torture (thermal shock), environmental control, battlefield manipulation (creating fog, ice, steam).

Combination Power: Combined with Cryoarchitectonics creates devastating temperature weapons. Cryo practitioner extracts heat, Pyrosonics practitioner weaponizes it elsewhere—perfect synergy.

Limitation: Requires line of sight to both source and target, distance reduces efficiency, extreme differentials difficult to maintain, conservation of energy applies (cannot create/destroy heat, only move it).

Function: Generates infrasound (below human hearing, 1-20 Hz)—frequencies that cause nausea, panic, organ damage, loss of bowel control, and at extreme levels, death. Weaponizes sound humans cannot consciously perceive. Called "fear frequency" because it triggers primal terror responses.

Thread Cost: Moderate-High (40-60%)

Applications: Crowd control (inducing panic/nausea), assassination (untraceable—appears as heart attack/stroke), area denial, psychological warfare, riot suppression.

Effects by Intensity:

• Low: Anxiety, unease, sense of presence ("haunted" feeling)
• Medium: Nausea, dizziness, bowel/bladder control loss, disorientation
• High: Organ damage, internal bleeding, heart arrhythmia, lung hemorrhage
• Extreme: Catastrophic organ failure, death (appears natural—no visible wounds)

Ethical Catastrophe: Infrasound Weapon is invisible, untraceable, and can kill at distance appearing as natural death. Perfect assassination tool. Causes extreme suffering (bowel control loss humiliating, organ damage agonizing). Classified as inhumane weapon worldwide.

Legal Status: Forbidden in most jurisdictions—war crime if used in combat, illegal for civilian use, assassination via infrasound classified as premeditated murder with enhancement (cruel and unusual method).

Limitation: Affects practitioner if not carefully shielded, low frequencies carry through barriers (hard to contain), difficult to target precisely (area effect), skilled Corpus practitioners can detect/heal damage, leaves subtle evidence (organ damage pattern recognizable to experts).

Function: Temporarily reverses local thermodynamic time—heat flows from cold to hot, disorder decreases, broken objects self-repair. Violates second law of thermodynamics within limited region for brief duration. Related to Cryoarchitectonics entropy manipulation but using heat as medium.

Thread Cost: Extreme (75-90%, proportional to reversed entropy)

Applications: Instant repair (objects self-assemble), defensive (projectiles de-accelerate), firefighting (flames flow backwards into fuel), tactical (enemy weapons self-destruct in reverse).

Catastrophic Failure: Reversed entropy must "snap back" when effect ends—all disorder returns violently plus accumulated interest. Failed Thermodynamic Reversal causes explosive entropy rebound, creating localized reality breakdown or Class 1-2 CWZ.

Limitation: Brief duration only (seconds), entropy rebound dangerous, extreme thread cost, risks CWZ formation, technically violates natural law (destabilizes reality), requires perfect execution or catastrophic failure.

Function: Creates "black hole" for sound—region where acoustic waves cannot escape, trapped by extreme acoustic impedance gradient. All sound entering event horizon absorbed permanently. Can theoretically trap other wave phenomena (light, heat, quantum fields) if strong enough.

Thread Cost: Extreme (85-95%, may require multiple practitioners)

Theoretical Results:

• Sound cannot escape event horizon (perfect silence within)
• Acoustic energy accumulates inside (pressure builds catastrophically)
• Eventually collapses (explosive release or reality tear)
• May trap other wave phenomena (EM fields, thermal radiation, potentially Weave itself)

Why Forbidden: No successful attempts without catastrophic collapse, acoustic event horizons unstable (collapse violently), may create actual black hole (gravity-acoustic coupling), reality fabric tears possible (Weave trapped inside), collapse creates devastating sonic explosion (stored energy released at once).

Speculation: Pre-collapse may have weaponized sonic black holes (ultimate siege weapon). Fall possibly related to sonic singularity experiments tearing reality fabric.

Legal Status: Research forbidden, theoretical knowledge classified, attempting Sonic Black Hole illegal under reality-threatening technology laws.

Limitation: Theoretical only (no confirmed successes), attempts catastrophic, may be impossible (acoustic event horizons require conditions beyond QW system capability), risks reality breakdown.

• Thermal Backlash: Uncontrolled heat burning the practitioner from within
• Resonant Cascade: Harmonic frequencies affecting unintended targets, including the Weaver
• Acoustic Overload: Sonic pressure rupturing eardrums or causing brain hemorrhage
• Frequency Lock: Practitioner's own threads vibrating destructively
• Thermal Runaway: Uncontrolled temperature increase consuming thread reserves catastrophically

• Understanding of thermodynamics and acoustic physics
• Musical or tonal aptitude (for precise frequency control)
• Emotional control (anger can cause unintended thermal spikes)
• Environmental awareness (to avoid collateral damage)
• Resistance to heat and loud noise (conditioning)

Thread Economy

Pyrosonics is moderately expensive in thread consumption. While generating heat is relatively efficient, maintaining controlled burns or sustained sonic assaults can rapidly deplete reserves. Harmonic destruction requires intense but brief thread bursts.

The Heat Paradox

Pyrosonics requires emotional heat (passion, intensity, confidence), technical precision (exact frequencies, controlled power), and physical resilience (exposure to heat/sound, sensory overload). This combination attracts passionate, intense personalities while demanding rigorous discipline—a volatile mix.

Harmonic Feedback Risk

Pyrosonics practitioners must be extremely careful with vocal commands. Their spoken phonemes ARE acoustic vibrations—mispronunciation can create destructive interference with their own working, causing immediate catastrophic failure (threads resonating destructively, internal injuries).