Skill: [Etheric Pursuit]

  Φ Cost: +0.2 Hz

  Φ Used: 0.6 Hz → 0.8 Hz

  Φ Max: 0.89 Hz (ν × 0.5)

  System Load: 89.9%

  Effect: Target fluctuation anticipation (+15% synchronization speed)

  The subject engaged the sequence. A subtle modulation of its internal etheric flux created a preemptive resonance link with the first Shadow. The creature—a simple accumulation of etheric residue in veil form—didn't detect the approach until the distance fell to 1.2 meters.

  [ECHO – TARGET SYNCHRONIZATION #1]

  

  Target ν: 28.1 Hz

  Subject ν: 1.78 Hz

  Initial Gap: 26.32 Hz

  Strategy: Stepwise frequency alignment

  Estimated Time: 3.5 seconds

  The entity applied the skill. Its fundamental index performed a series of rapid adjustments, matched to the anticipated fluctuation pattern. The resonance battle resolved into a learning curve: after 2.1 seconds, the gap reduced to 0.3 Hz. The final phase required 1.0 additional second for perfect lock.

  [SYNCHRONIZATION SUCCESSFUL – 3.1 SECONDS]

  

  Final Gap: 0.0 Hz

  Absorption initiated

  The biomass incorporation process was efficient but brief. The Residual Shadow's etheric mass (~0.3 m3) disintegrated in 4.2 seconds. Raw data was processed.

  [IMMEDIATE ACQUISITION]

  

  S Gain: +2.1%

  ν Gain: +0.07 Hz

  Δ Impact: -1%

  [Residual Shadow] Sequence Progress: 38% → 40%

  The second target, 3.5 meters away, had slightly altered its drift but remained in operational range. The subject repeated the sequence with parameters optimized from the first interaction. Fluctuation anticipation, enriched by freshly acquired data, reduced calculation time.

  Gains were identical, consolidating progress.

  [ECHO – ABSORPTION SUMMARY]

  Stolen from Royal Road, this story should be reported if encountered on Amazon.

  

  Consolidated Gains:

  S: +2.1% + 2.1% = +4.2%

  ν: +0.07 Hz + 0.07 Hz = +0.14 Hz

  Δ: -1% × 2 = -2%

  [Residual Shadow] Sequence: 38% → 42%

  Total Operation Time: 14.3 seconds

  The specimen deactivated [Etheric Pursuit], freeing 0.2 Hz of etheric flux. System load dropped to 67.4%. The immediate environment returned to neutral, with no other hostile signatures detected within ten meters.

  [STATUS UPDATE – SPECIMEN #00]

  

  ν: 1.92 Hz

  ρ: 0.19

  S: 56.91%

  Δ: 63%

  Φ_max: 0.96 Hz (ν × 0.5)

  Φ_used: 0.6 Hz (62.5%)

  Active Mutations: [Etheric Pursuit]

  Next Objective: Stabilize Δ above 65% before further hunting.

  Absorption of the second Residual Shadow was nearing completion when the first anomaly manifested. A discordant vibration, distinct from the regular assimilation flow, coursed through the specimen's biomechanical framework. It took the form of a low-frequency tremor—a 0.5 Hz dissonance superimposed on the target's etheric signature, causing micro-deformations in internal coherence filaments.

  [ECHO – ALERT]

  

  Stability fluctuation detected.

  Origin: Etheric stress accumulation.

  Current Δ: 63.0%

  Instability Threshold: 60.0%

  Consequences: If Δ < 60% → random handicaps (-10% efficiency for 5 min).

  Cause: Cumulative absorption without rest (Δ: 65% → 63%).

  Recommendation: Cease all Δ-impacting activity for 30 min.

  Specimen #00 terminated all active etheric flux solicitation. The absorption protocol was abruptly interrupted at 98.7% completion, allowing a tiny fraction of biomass to dissipate into the Waste Pit's humid air.

  The immediate environment—a corroded stone corridor oozing moisture—was plunged into the verdant gloom of wall-attached luminescent fungi. Their stable ~25 Hz signatures constituted the only constant vibrational background.

  The primary survival directive shifted from "hunting" to "structural integrity preservation."

  The subject retracted its sensory appendages and adopted a low-profile posture, reducing its contact surface with ambient vibrations. Analysis of Δ's natural decay rate confirmed a -0.125% loss per hour, or -1% every eight hours. Crossing the 60% threshold via this method wasn't imminent, but any additional absorption would inevitably precipitate it.

  Then a new signature polluted the perception field. Nine meters away, in a corridor branch, three distinct signatures oscillating between 18-22 Hz advanced toward its position.

  Comparative analysis indicated: 87% profile match with "Scout Goblins." Their raw etheric emissions, unsuppressed, betrayed slow but methodical progress—likely a routine patrol.

  [ECHO – THREAT ANALYSIS]

  

  Threat Identified: Scout Goblins (Grade 0-1).

  Number: 3 units.

  Average ν: 20.3 Hz.

  Distance: 8.7 meters and closing.

  ν Gap with Specimen: +18.38 Hz (significant disadvantage).

  Recommendation: Silent evasion or camouflage. Engagement not recommended (high Δ risk).

  The specimen deactivated its last active mutation, Etheric Pursuit, freeing the 0.2 Hz of etheric flux it consumed.

  System load dropped to 0.6 Hz out of 0.96 Hz available (62.5%). All superfluous emissions were cut.

  The subject then initiated a slow retreat, exploiting wall concretions' shadows and low light. The Stability Membrane was partially simulated via increased physical grounding: lower extremities increased their adhesion coefficient to dried mud by 30%, minimizing transmitted vibrations.

  The goblin patrol passed within five meters, ignoring the motionless form crouched in a wall crevice. Their guttural grunts and rusted weapon clatter saturated the air for forty-three seconds before fading.

  With immediate danger past, the specimen continued its retreat toward a previously identified fissure where scans had recorded a perfectly stable ν_zone of 50 Hz.

  Reaching this niche, the subject performed a full diagnostic. The Δ loss, though minor, had slightly altered synchronization efficiency. The tolerance window for future frequency alignments was reduced by 0.3%.

  [INTERIM STATUS – SPECIMEN #00]

  

  ν: 1.92 Hz (stable)

  ρ: 0.19

  S: 56.91%

  Δ: 63.0% (critical threshold: 60.0%)

  Φ Used: 0.6/0.96 Hz (62.5%)

  Active Mutations: None

  Next Objective: Restore Δ above 65% by any available means. Hunting prohibited until stabilization.

  The priority became clear. Rest in this 50 Hz zone would only provide too slow a correction.

  Local resource analysis began, cross-referencing codex data with past scan memories.

  One substance, Purified Bioluminescent Sludge, showed restorative properties. Its rarity was high, but its discovery became the only viable option for rapid stabilization.

  The specimen oriented its sensors toward the dampest, most organic-rich zones where probability of presence was estimated at 0.3 units per square kilometer.

  The quest began under the constraint of a vibrational sword of Damocles.