1) Dune weapon 
Weapon made from the tooth of a sandworm from Arrakis.
A knife with a blade formed from the tooth of a dead sandworm. It’s the weapon of choice for the Fremen and is typically laced with fast-acting poison. There are two forms of crysknives: unfixed blades that disintegrate unless kept close to a human body’s energetic field or fixed, which do not disintegrate. Sacred to the Fremen, once a crysknif...