Players can take on some truly confusing quests in the Codex book of Throne and Liberty. While a majority of these side quests will spell out the places that players need to go, the spots they need to examine, and the people they have to fight to complete a quest, some will only give a vague description or hint about what to do and leave it there. Understanding how to see these quests to their end is a tricky thing. One of these quests, called Fonos Basin Treasure, comes along pretty late in the game.