This quest is not available in game.
Find the Greenwarden.
You've heard of the Greenwarden? You're not looking for him, are you? Well I say you're crazy if you are, but who am I to keep a fool from his death?
If you are seeking that beast, then I hear he is in the marsh, east of the road where it forks to Dun Modr. He's lurking there among the crocs...and worse!
And leave your money here. You won't need it where you're going...and you don't want to chip ol' Greenie's tooth on your gold when he bites you in half, do you?