This quest is not available in game.
Primal Torntusk at Revantusk Village in the Hinterlands wants you to recover 5 Vessels of Tainted Blood from Jintha'alor. Return to Primal Torntusk when this task is complete.
The Vilebranch fight with supernatural ferocity. This is due to the foul magical weavings of the Vile Priestess Hexx.
Throughout Jintha'alor you will find dark vessels of tainted blood. The vessels radiate the foul magic of the faceless blood God, empowering the Vilebranch and also driving them to madness.
Steal those vessels and return them to me so that I may remove the taint and ultimately loosen the grip of the blood God.