Windseer Grayhorn in Conquest Hold wants you to go to Grizzlemaw and obtain 8 of Vordrassil's Seeds.
We must make sure that Vordrassil is never regrown. The furbolg must have harvested its seed.
Go to Grizzlemaw, in central Grizzly Hills, and obtain all the seeds that you can find. I will make sure they're properly destroyed.