The objective: Kill Hungry Creyce
Hungry Creyce is located in the cavern of trials. You get there through moongorge. When you're about half-way though, you can see some swirly blue things to your left. Go into one of them and you're in. Try avoiding the greedy plunderers(lvl 9) (stay hard left) and go right to the end. Hungry Creyce is a lvl 12 elite beast.
It's suggested that you go in at a higher lvl than 10 or with a party because this quest is tough