Vordrassil's Fall

Long ago, powerful druids planted a tree to the northeast of here.$B$BIt was called Vordrassil and it was to be a world tree. It is not known why, but after the tree was fully grown, the druids decided it needed to be destroyed.$B$BEver since we arrived here, the earth has spoken to me, $N. Its cries of pain come from the places where Vordrassil's remains fell on the ground.$B$BCorrupting ooze roams those places. Bring me samples of it so we may begin to heal the land.