Sasha at the White Pine Trading Post wants you to go to Bloodmoon Isle and slay Selas, Varlam, Goremaw and the Shade of Arugal.
1x Shade of Arugal defeated
It is time, then, [player]. Arugal must be defeated.
Get a couple of people you can trust and head for Bloodmoon Isle. It's just off the coast, east of here.
We'll hit them fast. Take out Arugal's lieutenants -- I'll catch up with you when it's time to take out the monster himself.