Most of the optional bosses in Clair Obscur: Expedition 33 can be found by exploring the continent on Esquie and locating hidden beaches and islands. However, the Chromatic Greatsword Cultist can be found within a dungeon as you're exploring Sirene during a story mission.

The Chromatic Greatsword Cultist is a powerful boss enemy with access to multiple attacks and a massive sword that can KO your party in one swipe. It also repeatedly casts shields on itself, making this super version of the Cultist a dangerous foe that's almost invulnerable to your attacks without the right skills and party setup. For those struggling, here's how to beat the Chromatic Greatsword Cultist in Clair Obscur: Expedition 33.

Where To Find The Chromatic Greatsword Cultist In Clair Obscur: Expedition 33

The Chromatic Greatsword Cultist can be found inside Sirene. The party will enter the Sirene dungeon area as part of the story, and to find the boss, you must run past the dancers through the archway on the left - opposite the Expedition 55 Journal.

Walk through the opening and descend to the lower platforms. Then, ride the floating platform to the next area, but take a left, and the Chromatic Greatsword Cultist will be waiting. It will attack on sight, so make sure the party is healed.

How To Beat The Chromatic Greatsword Cultist In Clair Obscur: Expedition 33

Attacks

Six combo attacks on all party members and a jump attack on all members

Resistance

Light

Weakness

Dark

Defense

Casts multiple shields

The Chromatic Greatsword Cultist is similar to the regular versions of the Greatsword Cultist, except it hits harder, faster, and has a much higher health bar. It will soak itself in blood and attack all party members with a six-hit combination that is difficult to parry, because it takes slight pauses in between the second half of its attack patterns.

It will also use a powerful jumping attack on a single party member, but these are less troublesome when it comes to parrying. It becomes more problematic when it casts up to nine shields on itself, absorbing all of the party's attacks in one turn before they are depleted.

The Chromatic Greatsword cultist is vulnerable to Dark magic, so Sciel is a solid choice, or players can equip each party member with skills and weapons that utilize Dark attacks. Maelle's Breaking Rules skill is invaluable because it will wipe all of the boss's shields and land significant damage. With the Shields down, hit the enemy with Verso's Blitz attacks for an extra turn and Phantom Stars for five hits.

Rewards For Beating The Chromatic Greatsword Cultist

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Clair Obscur: Expedition 33
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Turn-Based RPG
JRPG
Fantasy
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Systems
PlayStation-1 Xbox-1 PC-1
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Top Critic Avg: 92 /100 Critics Rec: 97%
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Released
April 24, 2025
ESRB
Mature 17+ / Blood and Gore, Strong Language, Suggestive Themes, Violence
Developer(s)
Sandfall Interactive
Publisher(s)
Kepler Interactive
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DIGITAL
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Engine
Unreal Engine 5
Genre(s)
Turn-Based RPG, JRPG, Fantasy