I managed to kill the Goblin Boss in the ruined keep and also eliminated the Rakshasa and the Polar Bear. The goblin left a necklace so I brought it back to town and also solved another side quest there. I’ve spent most of my money to upgrade my equipment so now I’m broke again. The necklace turned out to be a key so I had to go back to the keep to find a door that it unlocks. My next quest is to simply explore the tower.