One of the Zone's examples of mutated vegetation. Reacts to rapidly approaching living beings by discharging a cloud of projectiles severely injuring uncovered or lightly protected skin upon contact. Does not react to slowly moving targets. Forms three types of artifacts (possibly its seeds): Thorn, Crystal Thorn and Urchin.
- Encyclopedia description


  • Seen hanging from various man-made structures throughout the Zone.
  • Relatively harmless to the player.


  • Despite encyclopedia claims concerning artifacts, in the Lost Alpha game space very few of these anomalies are scripted to be able to spawn the relevant artifacts.


  • In the Base Game, very few were actually injurious to the player.