File ID: KAC-5163
Designation: "Muramasa"
Threat Level: Category 3 (Global Threat)
Status: Bound
Discovering Officer: ███
World of Origin: ███
---
[DESCRIPTION]
KAC-5163 is a single-edged, curved katana measuring 78.4 cm in blade length, forged in an unknown variant of folded steel exhibiting crimson-black striations. The blade emits a faint, pulsating aura resembling blood vapor and black flame, which intensifies in the presence of hostility.
Although attributed to the legendary swordsmith Muramasa, KAC-5163 demonstrates properties inconsistent with standard anomalous objects:
- The blade is alive at a conceptual level, possessing rudimentary sentience.
- It emits a low-frequency hum detectable in Aura-sensitive individuals, interpreted as a heartbeat.
- When unsheathed, all living organisms within a 5 m radius experience a measurable spike in aggression, adrenaline, and instinctive focus on survival at any cost.
KAC-5163 amplifies the wielder's suppressed violent impulses and survival instincts, creating a dangerous synergy in inexperienced handlers. However, in trained hands—specifically in ███ hands—this amplification results in superhuman combat capability without mental collapse.
---
[BEHAVIOUR]
KAC-5163 displays the following behavioral patterns:
Selective acceptance: The sword chooses its wielder. It cannot be lifted by anyone it rejects—attempts result in immediate deep lacerations or backlash.
Predatory resonance: The blade vibrates in response to nearby bloodshed or strong negative emotions.
Emotional mirroring: When the wielder experiences fear, hesitation, or sorrow, the blade's aura flares, as though encouraging decisive action.
Blood Memory: KAC-5163 stores impressions of battles fought with it. When wielded, it subtly guides the wielder's movements as if recalling centuries of martial encounters.
The sword does not speak or show overt intelligence, but long-term observation confirms a reactive, adaptive personality oriented around protection through lethal force.
---
[CONTAINMENT ATTEMPT]
Attempts to separate KAC-5163 from ███ permanently have been deemed unethical and dangerous, as the blade displays increasing hostility when handled by non-selected personnel.
---
[FINAL NEUTRALIZATION]
Due to its metaphysical nature, KAC-5163 cannot be destroyed by conventional means. Containment attempts have only resulted in temporary disarmament before the blade reappears beside its wielder or within its original sealed shrine located in ███.
---
[NOTES BY ███]
"It seeks the strongest possible wielder."
- ███
---
[FILE END]