Rift Quest:The Secret Ingredient is Lymph  

Due west of Coterie Camp you will find Dreadbone Shelf. Kill any and all Dreadbone Troglodytes for the Light Lymph. It is confirmed to drop from Brutes and Wretches. When you collect ten of these return to Crim Tinshin at Coterie Camp for your reward. Congratulations on helping him poison the camp.