Archives of Nethys

Pathfinder | Starfinder

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Biotech

Functioning similarly to cybernetics, biotech items include modifications to your DNA combined with implants of biological origin that integrate into your physiology. Biotech mostly operates by the same rules as cybernetics and uses the same implantation slots.

Gill Sheath

Source Starfinder Core Rulebook pg. 211
Item Level 1; Price 95; System Lungs
An external lining striated with oxygen-filtering nodules coats the outside of your lungs. If you breathe in water, it filters into the lining, where the nodules extract the oxygen and deposit it into your lungs. This lets you breathe underwater or in the air. You still exhale normally.