Ritual Knife

The  is a weapon added to Fallout 3 with the release of the Point Lookout add-on. It is used by the Swampfolk and can be repaired with Knives as well as the Slasher Knife and Ant's Sting. This weapon has the lowest AP cost in the entire game, as well as a very high rate of fire. Keep in mind that the weapon has a high critical hit multiplier, making all those attacks even more effective, especially when boosted with fitting perks and equipment.

It is found in the caves beneath the Ritual Site on the sacrificing table near the book after beginning the quest The Dark Heart of Blackhall.

Appearances
The appears in the Fallout 3 add-on Point Lookout.