Four Silver Fangblades

The Four Silver Fangblades are needed in requirement to summon the Great Devourer; which, when awakened, will devour all of Ninjago (including the Serpentine themselves). They were created from the Devourer's teeth. The colors of the Fangblades are green, red, blue, and plain silver to correspond with the colors of the four main Serpentine tribes. Pythor P. Chumsworth used a map to find them, gathered all four, and ultimately unleashed the Great Devourer.

Locations
The locations of the blades were revealed when the Anti-Venom from the Snake Staffs mixed. The locations are the following:


 * Hypnobrai: Mega Monster Amusement Park
 * Fangpyre: Fire Temple
 * Constrictai: The Blade Cup ( Formely at the Desert Pyramid)
 * Venomari: Unknown location

The map for the Four Silver Fangblades was created when Skalidor and Acidicus were hitting each other with their staffs as allies. The venom from the Staffs made the map form.

Ninjago.com Description
All four of the fangblades have the same description:

One of the four tribal silver fang blades that, when combined, will unleash The Great Devourer.If you look closely when the statue of the great devourer collapses,you can see 3 of the fangblades still there.