The Root of All Evil in Clair Obscur: Expedition 33 is a late-game optional section that prioritizes intense combat encounters over open exploration.
The location sits within Verso’s Drafts, a post-campaign zone introduced in the Thank You Update, and is accessible only once the main story is finished and Esquie’s Nest is reached.
To begin the journey, mount Esquie and fly back toward Lumiere on the overworld map.
Along this return route, players should look carefully to the left side of the sky path, where a newly accessible underwater dungeon appears.
The underwater entrance leads straight to Verso’s Drafts and is the sole access point to the Root of All Evil, which makes it easy to overlook during post-story exploration.
How Do You Navigate Verso’s Drafts to Reach the Entrance?
Once inside Verso’s Drafts, progression is mostly linear but relies heavily on environmental landmarks.

Advance along the main path until the area expands, at which point a towering Esquie Head statue will appear in the distance as your primary navigation landmark.
While you can move directly toward it at first, progression eventually requires taking a short detour to open a cake door, which unlocks access to additional paths and another Expedition Flag.
This flag functions as a train station, introducing the train system used to reach deeper sections of Verso’s Drafts.
After opening the door and advancing, board the nearby train and continue onward.
Along the route, enemies such as Licornapieds may appear, but they are optional and can be avoided if you want to conserve resources before the upcoming boss fight.
What Happens Once You Enter the Root of All Evil?
Taking the next train drops you at the base of the Esquie Head statue, where a portal inside the structure leads directly into the Root of All Evil.

The area’s small, enclosed design draws clear parallels to Esquie’s Nest and The Abyss, and it contains no optional routes or side content.
Shortly after entering, you will find the Main Field Expedition Flag, allowing you to prepare before moving forward.
Climbing the nearby stairs triggers a cutscene that summons Osquio, the sole boss of the area and the final encounter within Verso’s Drafts.
Defeating Osquio concludes the challenge and rewards players with high-tier materials, a unique weapon for Verso, and exclusive Osquio-themed outfits and haircuts.
After the fight, a Gestral Merchant appears near the flag, selling additional cosmetics for other party members.
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