A curse which makes the bearer invincible, but also forces him/her to kill his/her immediate family. Every once in a while on Halloween (and only Halloween), the Thorn constellation appears in the sky, signalling the followers of Thorn to curse a new person. When done, prosperity falls on the whole tribe. Michael Myers
is currently cursed with Thorn, and Terence Wynn (who is currently missing) serves as his watcher. A person with allegiance to Thorn can be identified by a Thorn tattoo on their right wrist.