A last-resort medical modification that triggers when the body detects catastrophic trauma — massive blood loss, organ perforation, or systemic shock. Modified blood cells and skin glands produce a rapid-setting biological cocoon around the injury site (or the entire body in cases of multiple-site trauma), sealing wounds, applying compression, and creating a sterile biological cast. The cocoon material is a fibrin-silk hybrid that sets in seconds, is breathable, and maintains the body in a stabilized state for up to 4 hours — long enough for emergency medical extraction in most situations. The user is conscious during cocoon formation and describes the experience as 'being wrapped in warm concrete.' The cocoon must be dissolved with an enzymatic solution for medical access. It is, essentially, the body's own emergency room — deployed automatically when all else fails.