Harvest 10-18 life root. These are unique harvesting nodes found among the roots of trees on Temple Grounds (very rare) and Breeding Grounds (not as rare). The quest can be deleted immediately and re-obtained if you wish to have to harvest fewer to complete.
You will have to cope with the monsters on Breeding Grounds if you go there (level 62). Try the 2 trees at main entrance ( -2, 20, 208 ) /waypoint -2, 20, 208 in between each root of the trees. Then wait and they will spawn again.
Return to the Hidden Shelter, and speak to Surgeon Kweezil for your reward.