Salve via Gathering

Horde receive this quest from, while Alliance get it from. The first time it is completed, it counts towards the Loremaster of Kalimdor achievement. The repeatable version offered after that does not.

This quest is only offered to Herbalists.

Objectives
A Cenarion beacon allows a seasoned herbalist to spot insidious fel creep - a malfeasant product of Felwood's corruption. My work here has taught me the knowledge of purifying fel creep into a cleansing reagent... used in what we now refer to as Cenarion plant salve.

When you gather herbs in Felwood, you should encounter the fel creep so long as you have the beacon. In exchange for what you bring to me, I will give you pre-made Cenarion plant salve.
 * Fel Creep (4)

Completion
Excellent work - every bit of this, once we purify it, will help us take back Felwood. Here, take some doses of Cenarion plant salve and head into the forest. The reclaiming of the land from the corruption waits for no !

Reward
Upon completion of this quest you will gain:
 * 2x Cenarion Plant Salve

The first time this is completed, you also gain 6100 XP.