The Corruption's Source

Objectives
Kill Zenn Foulhoof and 10 Vile Grell in Cliffspring Hollow. ("Zenn Foulhoof: Patience and virtue only go so far. Some lines must never be crossed, and Zenn has crossed several of them.")
 * Zenn Foulhoof slain
 * Vile Grell slain (10)

Description
I rushed here as soon as I heard the news from Wizbang. I know who's behind this mess now. Zenn Foulhoof.

He came over from Teldrassil after he was chased out for performing perverse magics. The kinds of corruption he employs are not welcome among my people, and it seems he's taken it a step further this time, perhaps as some form of revenge.

Zenn's been given too many chances, it's time we remove this threat to all that is natural. Kill Zenn and his minions, and then find me back in Lor'danel.

Rewards
You will also receive:
 * 880 XP
 * 250 reputation with Darnassus

Progress
This is never desirable work. Zenn was not always the corrupt being that you now see. Sadly, he is behind reproach at this point. Much of the damage that he has done to nature is irreversible.

Completion
It is done then. Thank you. I only hope that the wildlife here will see more peace with his passing.