"Cave 13" is the twenty-ninth chapter of Blame!, and the fifth chapter of Volume 5.


Cibo and Killy return to the universal constructor in the eighth cave of Toha Heavy Industries. Mensab uses it to heal Seu’s wounds. While it works superficially, his memories and mental faculties have been degrading steadily for some time.

Mensab explains that in response to the Silicon life’s invasion of Toha, she sent all the humans in her charge to the thirteenth cave, including the newcomers from the Electrofisher village. The Silicon creatures, she says, brought a contagion with them, but the thirteenth cave was uninhabited, and left uncontaminated.

Although Mensab accounts for Seu’s mental decline by the Silicon contagion, she blames a control system called Central for interfering with his regeneration. She and Seu depart, and Cibo and Killy leave for the thirteenth cave.

The Electrofishers have established a base in the thirteenth cave. Zuru and her scouts slay a Silicon creature, concluding that there are enemies similar to Safeguards in the area.

Ivy and Maeve discover the creature’s corpse, discerning that the Electrofishers are nearby from the arrows of their weapons.

Character Appearances

Notes & Trivia

  • The Toha Custodians are confused that Cibo and Killy are aware of their power limitations. From the Custodians’ perspective, they have never met; in Log 28, Cibo and Killy travelled back in time to before the events in the Toha elevator.

Blame! - Volumes and Chapters
Volume 1 The Net's OffspringMemories of EarthTechno NomadsEX-LOGThe AuthoritiesEscapeSilicon Souls
The Builders
Volume 2 EX-LOG - Nest RuineThe CapitolThe CorporationNet SphereSafety Guard
Volume 3 The Great SurfElectrosilos FishermenPlantersAwakeningAssaultBasic LanguageMassacre
Volume 4 Backup CyberspaceLimit CancelHybridToha Heavy IndustriesElectronic KnightThe Eighth Cave
Volume 5 HackingScattered SpaceGravity FurnaceVersionCave 13Cease Fire
Volume 6 Sanakan and CiboVibrationCollapseDissolutionDisappearanceBeautiful LifeUnofficial Megastructure
Volume 7 Central NexusClass 1 Critical Effect WeaponCaptureAnti-Intrusion Electron Space
The Megastructure's Internal FissureSpecial Safeguards
Volume 8 Inside the MegastructureMultiple Dispersion Molecule MovementProvisional Connection CertificationRaid
UrgeLevel 9Far-Off
Volume 9 Parallel Electricity Storage Tank ClusterThe CallerLacking EscapeThe CaptorAnother MeetingPeople
The Observer
Volume 10 Unified Metal BeamsContinuumOrganicBurning SiliconRescue of the ReceptacleExterminator, First ClassRetrieved ConsciousnessThe Edge of the City