In the world of Octopath Traveler 0, players will encounter four distinct types of treasure chests, among which the Blue Chests stand out as the most challenging to unlock. Gaining access to these chests is essential for players looking to acquire some of the game’s most formidable weapons, accessories, and skills.
How to Obtain the Key for Blue Chests in Octopath Traveler 0

As with other titles developed by Square Enix, such as the earlier Octopath series and the Bravely Default games, the Blue Chests are locked and can only be opened using a unique item known as a Skeleton Key.
In Octopath Traveler 0, acquiring this elusive key involves a specific sequence of events tied to the game’s main storyline, particularly the restoration of Wishvale. Players should be cautious if they wish to avoid spoilers related to this crucial quest.
To start the process of unlocking Blue Chests, players must first construct a Church in Wishvale. This task is intertwined with the Kindlers of the Flame main quest, requiring players to delve deeper into the narrative.

Specifically, to unlock the Church, players need to progress to Chapter 5 of the Kindlers of the Flame questline and reconnect with Laurana. After recruiting this Cleric, players must return to Wishvale to reconstruct the Aelfric Church and enhance it to Level 3, which requires 12 Radiant Cornerstones.
Radiant Cornerstones are obtained by defeating Elite enemies found throughout the world of Osterra. It’s likely that players have already accumulated enough of these items to facilitate the Church’s upgrade.
Once the Church reaches Level 3, players will gain the ability to open Blue Chests across the game world, while simultaneously increasing their Helper Capacity to a maximum of 9.
These enhancements not only unlock potential rewards but also significantly enrich the gameplay experience, making it a worthwhile endeavor for players eager to explore all that Octopath Traveler 0 has to offer.
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