👉 Terror Fluid, also known as Toxin X, is a fictional substance from the "Alien" film series, introduced in "Alien" (1979) and further developed in subsequent films. It is a highly contagious, neurotoxic, and deadly fluid produced by the Xenomorphs, an alien species. Terror Fluid causes severe hallucinations, disorientation, and violent aggression in humans, often leading to a state of terror and panic. Its effects can be so intense that it paralyzes victims, making them susceptible to physical attacks by the Xenomorphs. The fluid's presence is a critical plot device, driving the narrative and escalating the tension as humanity struggles to survive the alien threat.