Thorlind believes the poison you found poses a grave threat and has asked you to gather ingredients for an antidote. Find the Celeblam plants nearby.
'I recognize this poison, ${PLAYER}, and it frightens me. Glenneth and the Beornings may be in grave danger. But where there is a natural threat, there is a natural cure. The Celeblam flower can be found nearby. Quickly, gather some for me so we may craft an antidote.'
Celeblam flowers can be found nearby, in Eryn Lasgalen.
You should collect Celeblam.
Thorlind can be found north of the path in Eryn Lasgalen.
You should talk to Thorlind.