Osquio is one of the most memorable optional bosses in Clair Obscur: Expedition 33, not because he is purely evil, but because he represents the exaggerated villain born from Verso’s childhood imagination.
While Esquie is known for his warmth and humor, Osquio is framed as his “evil cousin,” ruling over a surreal, candy-colored nightmare that blends playful visuals with an unforgiving boss encounter.
Despite the whimsical setup, Osquio is a serious late-game challenge that tests a player’s mastery of dodging, parrying, and Gradient mechanics, and the rewards for defeating him make the fight well worth the effort.
How Do You Find Osquio?
To find Osquio, players need to travel to Verso’s Drafts, a special region in the southern Continent that was added in later updates and reflects Verso’s childhood imagination, complete with bright colors, toy-like environments, and carnival-style details.
After entering Verso’s Drafts, move deeper into the region toward a massive structure resembling Esquie’s head that is visible from a distance.
As you descend the path and veer to the right, you’ll reach the base of this structure, where a magical train awaits.
Riding the train transports you into a sub-area called Root of All Evil, Osquio’s personal domain.
Inside the Root of All Evil, progression is fairly straightforward. You’ll soon encounter an expedition flag, which serves as a checkpoint and preparation point before the fight.
This is where you should rest, finalize your party setup, and adjust skills.
Beyond the flag is a staircase leading into an arena-like space.
Approaching this area triggers a cutscene, officially beginning the boss battle with Osquio.
How Do You Defeat Osquio?
The fight against Osquio is divided into two distinct phases, and while the first phase is relatively straightforward for an endgame party, the second phase introduces mechanics that can completely cripple your damage output if handled poorly.
Osquio does not have elemental weaknesses or resistances, so party composition is flexible, but mechanical execution is critical.
During Phase One, Osquio relies on fast, multi-hit physical attacks, rolling charges, aerial slams, and projectile-based patterns using summoned masks or belt-fired shots.
These attacks are dangerous due to their speed and hit count, but there are no special status effects yet.
Players can approach this phase conservatively by focusing on dodging and parrying, or aggressively by using high-damage setups.
With the right build, Phase One can be rushed by layering buffs and triggering burst damage, but it’s not required to succeed.
Phase Two begins after Osquio’s first health bar is depleted, during which every hit he lands applies Barbapapa, reducing all attacks and skills to one damage per hit.
If Barbapapa stacks up, your party can become effectively useless offensively. This makes avoiding damage far more important than dealing damage during this phase.
Dodging and parrying are essential, as preventing Barbapapa from applying is much easier than removing multiple stacks later. Barbapapa can be mitigated in several ways.
Cleanse skills are highly recommended, as they allow you to remove the status from key damage dealers before it completely shuts them down.
Additionally, multi-hit attacks can strip Barbapapa stacks one at a time, making them more effective than single-hit skills.
Damage-over-time effects like burning remain useful since they continue to tick even while Barbapapa is active.
The key is to prevent the debuff from snowballing while maintaining steady pressure.
One of the most important moments in Phase Two is Osquio’s Drop Kick sequence.
This long combo ends with a Gradient attack, and most guides agree this is the safest and most reliable opportunity to regain control of the fight.
Rather than trying to parry every hit in the combo, players are advised to dodge through it and focus on landing the Gradient Parry at the very end, which triggers a Gradient Counter.
Landing a successful counter here creates valuable momentum and eases Barbapapa’s limitations, and Osquio continues fighting even after the second health bar is drained.
He immediately initiates a final scripted Gradient attack that involves a large void-based energy orb.
Missing the Gradient Counter results in an instant loss, even if the rest of the fight went well.
The correct timing is shortly before or exactly as the energy attack lands.
Successfully executing this Gradient Counter ends the battle and secures victory.
Defeating Osquio grants some of the best optional rewards in the game.
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