Simoso Weapon Location, Stats & Best Uses – Clair Obscur: Expedition 33 Guide

The Simoso is a high-powered Light-elemental weapon exclusive to Verso, with passive effects that scale incredibly well for late-game builds. With bonuses like bonus Light strikes, Burn chance, and even invincibility, it’s one of the most sought-after weapons in Clair Obscur: Expedition 33.

How to Get the Simoso Weapon

1. Unlock The Abyss
To find Simoso, you’ll first need access to The Abyss, an endgame area reachable after completing the Renoir’s Draft segment. Use Esquie’s underwater traversal ability to dive into this secret zone.

2. Defeat Simon
Deep within The Abyss, you’ll face Simon, a challenging optional boss with no elemental weakness and multiple attack phases. Bring Burn resistance, Light heals, and at least one AOE-capable character.

3. Claim Your Reward
Upon defeating Simon, you’ll unlock:

Simoso (Light-elemental weapon)
50x Color of Lumina
2x Perfect Chromo Catalyst

Simoso Weapon Stats

Element: Light
Max Power: 3228
Scaling:
- Vitality: A
- Might: S
User: Verso only

Simoso Passive Effects

Weapon Level	Effect
4	Triggers a bonus ethereal sword strike when using any skill (Light-based)
10	20% chance to apply Burn on Light damage
20	Grants invincibility for 1 turn if weapon rank is A or higher

Best Enemies to Use Simoso Against

Simoso excels against:

Void and Shadow-aligned enemies
- Especially bosses like Nox the Withered and Wraithwatchers
Burn-vulnerable enemies
- Including mutated beasts and Colorless Golems
Multi-phase bosses
- Where passive skill effects stack damage and survivability

Simoso is ideal for multi-action Light builds or status effect stacking, especially when paired with AOE support.

⚠️ Known Bug: Simoso Causes Performance Issues with Verso

Many players have reported a major bug when using Simoso with Verso:

Symptoms: FPS drops, GPU underutilization, and heavy stutter during long sessions
Cause: Likely due to Simoso’s passive triggering Light skill effects repeatedly, leading to a memory leak
Platforms Affected: PC and PlayStation 5

Temporary Fix:

Unequip Simoso
Restart the game
Avoid equipping Simoso on Verso until a patch is released

Sources:

We’ll update this post as soon as the developers confirm a patch or workaround.

Conclusion: Is Simoso Worth Using?

Yes—if you’re not using Verso, Simoso is still one of the best Light weapons in Clair Obscur: Expedition 33. Its passive scaling and elemental damage make it devastating against shadow and burn-weak foes. But for now, avoid using it with Verso until the bug is patched.