Go to Raven's Dust Island, go to Tarantula Lake then go back north to Anrak's little house, talk to Pauline to start the quest.
Go with the following items to save time.
* Have killed the Abominable snowman located in the ice cave on Arakas far north of the map
* Have a minimum of 2M5 golds
* Have an Ethereal amulet
Reward:
An Ethereal Key