KCD2's Legacy of the Forge DLC includes a lengthy side quest called In the Service of the Guild. This unlocks after finishing Klaus' Introduction and requires players to complete a ton of random quests. That said, if you play your cards right, you can earn the Warlock's Riddle trophy by completing a few key quests in the chain.

Finishing Random Quests

As mentioned, you will need to complete several random side quests to make your way to the Warlock's Riddle quest. These can come in any order, but all of them spawn from Klaus. He asks you to re-acquire goods that have been stolen by bandits.

While we can't give a full breakdown of every quest because they can be different for everyone, the gist is that you need to sneak or fight your way into a bandit camp and then grab important gear for the guild. After doing several of these over the course of a few days, Bushek will take over, sending you to meet the Alchemist.

Solving the Warlocks Riddle

The Alchemist is supposedly hanging out in the inn west of Kuttenberg. However, when you arrive, you won't be able to get into his room. Try to pick the lock to learn that's also not working, and then kick the door open.

You're greeted by a grisly scene. Look around to find a white paper on a shelf on your left. This Strange Riddle is the key to your success.

It can be a little confusing, but the riddle is pointing you toward the shrine near the inn. Head over and duck down to find a hidden plot behind the shrine. Pick up the ingredients and take them back to Bushek.

If you want to make it easier to get all of the unique armor in this DLC, select "I don't want anything" when prompted by Bushek. He'll give you the Armourer V sketch, which you'll need to get the full set. Take it to your armourer at your forge to eventually earn the option to purchase it. Either way, this finishes the quest, earning you the Warlock's Riddle trophy.