Go see DarkFang, the Dragon of Lighthaven, and say grave robber or crypt.

Go to the Crypt (under the cemetery) of Lighthaven. Kill the Grave Robber. He is often surrounded by several monsters, and they fight each other, so to be sure you land the final blow on the Grave Robber, it is recommended to kill everything around him first.

Return to DarkFang and say grave robber or crypt.

Rewards:

• 2,500 XP
  

Note: This quest is mandatory for the good oracle access. DarkFang will refuse to talk to you about the fangs if it has not been completed.