Duskmoon Tower | Bitterblack Isle - Dark Arisen DLC Dragon's Dogma Guide

Barroch - a merchant who you can come across in the labyrinth

Here you will complete one of the quest from the notice board - A Guiding Light. Barroch - as this is the name of the man that you encounter, just like Olra can be an innkeeper and also a merchant. Think of him as your starting point; fully secured with various herbs and materials. There are many doors that will lead you to various locations. Unfortunately, they will be unavailable until you progress with the storyline.

Try to open the door in front of you and you will find out that you need a key

In order to continue your journey, try to open the door which is opposite the place you came from. You need a Void Key, which can be found once you use the door on your right - in World of the Regret.