To the east of Delling City is the Tomb Of The Unknown King. Use the following directions straight from going into the tomb:
Go forward once, then turn right. Take the turn, then take a right. Go up once, and take a right. Then, go forward until you fight Sacred. After defeating Sacred, go out of the room and go forward once. Take a right, go around the turn, then take a right. Go forward and take a right. Keep going forward and release the flood gate. Leave the room and go forward until you reach a dead end. Go back once and take a left. Go forward twice and take a left. Go until you can take a right and do so. Go forward twice and activate the switch in the back. Go out of the room and go forward to the dead end. Go back to the first junction. Take a left and keep taking lefts until you find a drawbridge. Go across the bridge and battle Sacred and Minotaur. Defeat them and they will join you.