The Voorhees Dagger is a special weapon that was carried by Creighton Duke, who then gave it to Jessica Kimble to use for the purpose of killing Jason Voorhees and sending him to Hell, once and for all.
Appearance
When Duke carried the dagger, it was a simple, double-edged, black wood handle dagger. However, when he threw it to Jessica and she caught it, the simple dagger transformed into a nearly foot-long, bone handle double-edged weapon with a gold crossguard.
History
After a fierce struggle with Jason, Jessica managed to stab him through the heart from behind, which sent him to Hell for good, or at least until Freddy Krueger brought him back to life in Freddy vs. Jason.