The Northwest Castle

The northwest castle is the home of the dark elf, Astos. He has stolen Matoya's crystal and has charged the party with recovering his crown from the marsh cave. Once you return with it, he will attack you. When you beat him, you will get the crystal, which you need to rush back to Matoya. She will then give you the herb that will cure the prince of Elfland. There are three treasure chests in the northwest castle, all of which are locked behind doors. When you return with the key, you will get power staff, falchion, and iron gauntlet.