Introduces pufferfish toxin-producing bacterial symbionts into modified sweat glands in the palms, creating a contact-delivery venom system. When activated voluntarily through a stress-hormone trigger, the palms secrete a thin film of tetrodotoxin — enough to cause numbness, paralysis, and potentially death through skin contact. The activation requires deliberate effort; accidental poisoning is rare but not impossible. The user is immune to their own toxin through co-expressed sodium channel modifications. Gravemoss Biofoundry's version includes a visible warning coloration — the palms flush bright orange when toxin is active, an aposematic signal borrowed from poison dart frogs. Black-market versions skip the warning coloration, creating invisible poisoners. The modification is the most legally restricted geneware in GLMZ after military-grade installations.