Victim Zero originated as a volunteer in the laboratory's early mutagenic trials, subjected to experimental serums that caused uncontrollable cellular decay. The subject's body became the epicenter of the first containment breach, leaking toxic fluids that corrupted the local ecosystem. This initial failure triggered the chain reaction of mutations that now plague the course.

Victim Zero's physical form is unstable, with flesh that visibly shifts between solid and viscous states due to ongoing mutagenic reactions. It emits a low-level radiation that interferes with electronic equipment, causing sporadic glitches and surges. The entity leaves behind toxic residues that glow with neon green hues, marking its passage and increasing contamination zones. Its presence accelerates mutation rates in nearby flora and fauna, altering the course dynamically.

Victim Zero acts as a passive environmental hazard that intensifies contamination levels wherever it manifests. It influences events by serving as a mobile source of mutagenic spread, forcing players to adapt their strategies around its unpredictable appearances.