"Fangs of the Serpent" retractable dagger with scabbard
Made of aluminum in the form of two snakes intertwined with their respective tails, creating a forked, double-blade and the snake heads creating the hand guard.
This dagger can be seen in a deleted scene, when Thulsa Doom order a child to commit suicide.
This scene was directed by Ron Cobb. The snake trainer, Dr. Yves De Vestel "Tiva", took some photos in which this dagger can be seen.