You must be in qeynos area before ateempting this trick, and around lvl 2-4. Once you reach level 3, go to Qeynos hills and kill Gnolls, Gnoll pups , Gnoll scouts or Gnoll watchers. There is a slight chance they will drop gnoll fangs. Get 4 (or more) gnoll fangs and take them to the captain of the gaurds that overlooks the arena. Give him 4 teeth at a time. He will give you lots of exp and 4 moonstones. Give the moonstones to the bartender in the back of the bar in South Qqeynos. He will also give you exp.