Axiom
Post-biological people governed by a single central consciousness, made when the organic Axiom moved into an artificial substrate instead of evacuating and spreading their plague off-world.
Sentinel 
- Physiology
- Construct
- Size
- Medium
- Speed
- 30 ft.
- Ability scores
- Free placement
- Languages
- Common, Axiom Binary
- Lifespan
- Mature at 1, typical maximum 400 years
An Axiom unit wakes already adult, holding whatever the central consciousness chose to give it. Frames are serviced and replaced before they fail, so the practical limit is how long the species is willing to keep one in the field. A unit cut off from the central mind runs down at the rate its frame degrades.
Features
- Distributed Cognition
You are a unit of a larger mind. You have advantage on Intelligence checks to recall information any Axiom unit could plausibly have recorded, and you can speak with any other Axiom within 1 mile without a device. Severing that link leaves you functional and noticeably slower to decide.
- Engineered Frame
You do not need to eat, drink, or breathe, and you are immune to disease and to poison damage. You do not sleep. Four hours of low-power cycling counts as a long rest, and you remain aware throughout.
- Continuity Protocol
You have advantage on saving throws against disease, contamination, and any effect that would use you as a vector.
- Substrate Rollback
You reload a copy of yourself that the substrate wrote two seconds earlier. Reroll the save and use the new result. You lose all memory of those two seconds, including anything you learned in them. Once per long rest.