Deryn wants you to gather some unique plants in order to study their properties.
'Duvodiad, hello. My name is Deryn, a warrior-scout in training. My specialty lies in the study of plants, especially those with... peculiar properties.
'I have a slightly morbid request to make of you. The Wargs to the east have um... piled the bones of their victims in a rather dramatic fashion. You'll note that some of these bone piles have vines with purple flowers growing from them. Could you pluck some for me?
'Oh and you should know, I asked Marget to gather some and she made the incredible discovery that this plant is poisonous to the touch. Perhaps... wear gloves.'
The purple flowers of amethyst nightshade can be found to the north-east of Deryn, in Bloodhollow.
Deryn has asked you to gather amethyst nightshade in Bloodhollow.
Deryn can be found among his peers to the south-west of Bloodhollow.
You have collected enough amethyst nightshade to satisfy Deryn's needs. You should return to Deryn.