The ancient cliff giants of the southern region of Azshara consume the rock and buildings of the land for sustenance. The excrement from their consumption is a highly malleable and extremely strong crystal known as Azsharite.
The formations litter the southern arc, but few are ever recovered due to the extremely violent nature of the giants.
You are to venture south and recover enough of the Azsharite for the creation of the weapon's body. My felhounds will aid in the recovery of the crystal.