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 has a high rate of attack and the second lowest AP cost in the game.
Toy knife - using even less AP than the ritual knife (10 instead of 12) the toy knife uses the lowest amount of AP for any weapon in Fallout 3. However, it does very little damage, much less than the regular knife.
Playstation 3 The ritual knife will sometimes fall inside the sacrificing table making it difficult to obtain. It is possible to dislodge it with explosives and/or third person view to pick it up.[verified]