The ritual knife is used by the swampfolk in rituals. It can be repaired with knives as well as the slasher knife and Ant's Sting. This weapon, along with the atomic pulverizer, has a high rate of attack and the second lowest AP cost in the game — the lowest is the toy knife, but that weapon is less useful than the ritual knife due to its very low item HP, its lower damage and its lower critical hit multiplier.
Toy knifePoint Lookout, a knife with the lowest amount of AP for any weapon in Fallout 3. However, it does very little damage, much less than the regular knife.
The ritual knife is found in the caves beneath the Ritual Site, stuck in a skull on the sacrificing table near The Krivbeknih, after beginning the quest The Dark Heart of Blackhall (the cave's entrance is sealed until you start the quest).
Notes[]
One of Jaime's holotapes found in the Dunwich building speaks of a "sharp knife" used to "send him to deep temple". It is not known whether the ritual knife has any connection to this statement.
Bugs[]
PlayStation 3Xbox 360 Sometimes the knife will have "sunk" into the table or the body. It can be freed by explosives. Listen for the metallic clang to know if you have successfully freed the knife.