The Thorn is an artifact that can be found only in Shadow of Chernobyl.
"The result of the interaction between the anomaly Burnt Fuzz and the body of a careless stalker. The Thorn artifact pokes the body of its owner, no matter what. But it also helps clean the body of radionucliodes. Quite widespread and cheap." - Thorn artifact Shadow of Chernobyl item description.
Tad tricky to print, might have to align it yourself so the most thorns are touching the bottom but still, nicely done.