Question: how to get uuna wow?
Answer: Call of the Devourer drops from mobs scattered across Scavenger's Boneyard (/way Antoran Wastes 55 39)
Ur'zul Bone can be found at 50.4 56.1 next to Altar.
Imp Bone can be found inside imp cave which entrance is at 65.6 26.3.
Fiend Bone can be found at 52.4 35.3 next to black pillar left of trap.