How to One-Shot Simon in Clair Obscur: Expedition 33 (Hardest Boss Guide) ~ HaploGamingChef

Getting Ready for the Abyss: Unlocking Access

To challenge Simon, the toughest boss in Clair Obscur: Expedition 33, you'll first need access to the Abyss, an endgame zone reachable through Renoir’s Drafts. This place is designed for players around level 85–90, so make sure you're well-prepared.

Before heading in, you must:

Unlock the Fly ability through the main storyline.
Max out SK's relationship to level 7 to gain the ability to dive underwater.
Travel through Renoir’s Draft and follow the path to the Golden Tree to locate the Abyss entrance.

Why Simon is the Hardest Boss

Simon isn’t your typical endgame enemy. This two-phase fight includes health pools that can total over 50 million HP, and he packs mechanics that can make the battle seem impossible if approached traditionally. But with the right build, you can skip all that — and finish him before he even acts.

The One-Hit Build Strategy – Solo with Myel

This method centers on using only Myel in your party. It’s a solo strategy that turns your character into a glass cannon with immense burst power.

Key Gear:

Weapon: Medallum — obtained by dueling Golgra in Gestral Village.
- Ensure the Medallum is at level 33 for max damage.

Attribute Allocation:

Prioritize:
- Agility
- Defense
- Remaining points into Might

Essential Skills to Use

You won’t need many skills — this is all about raw, concentrated power:

Stendall: Your main offensive move
Last Stand: Resets action points and sets up another big hit

Picto and Lumina Setup

These elements make or break the one-hit strategy.

Critical Pictos:

Cheater: Enables two consecutive turns — absolutely essential
Energy Master & Energizing Turn: Help sustain action points for multiple powerful moves

Recommended Lumina Points Allocation (Approx. 192 points):

Prioritize nodes like:

At Death’s Door
Augmented Strike
Auto Powerful
Confident Fighter (+30% damage)
Critical Moment (increased crit chance)
Glass Cannon, Immaculate, Inverted Affinity (all boost damage)
Painted Power (story unlock, must-have)
Shortcut: Grants an extra turn under 30% HP
Solo Fighter: +50% damage when alone
First Offensive & First Strike: Ensure you go first and hit harder
Roulette: Adds a 200% damage roll – big risk, bigger reward

Optional picks:

Second Chance (free revive)
Energizing Burn, Rush, Start, Start Two, Start Three (for smoother energy gain)
Powered Attack (+20% damage boost)

Phase 1: One-Shot Simon (7–8 Million HP)

Enter the fight with only Myel active.

Use Stendall right away. With the buffs active, your damage should easily exceed 20–30 million — more than enough for this phase.

Phase 2: Overcoming Simon’s True Form

Simon’s second form has roughly 50 million HP. Your first hit will chunk a large portion, and the strategy kicks in from there.

Step-by-Step Turn Plan:

Open with Stendall – this first hit can do 20–30 million.
Use Free Aim Shot next, aiming to burn or mark Simon (optional but helps).
Trigger Last Stand to refill action points after falling below 30% HP.
With Shortcut, you'll act again instantly. Use Stendall one more time — it will deal even more damage because you’re at low HP.

If everything lands:

You can potentially exceed 100 million damage by adding burn/mark effects and equipping the Roulette buff.

Fine-Tuning the Strategy

You don’t need every exact node or item, but aim to cover:

High damage modifiers (Solo Fighter, Glass Cannon, etc.)
Bonus turns (Cheater, Shortcut)
Energy efficiency (Energy Master, Rush)

Adjust based on your current Lumina points and Picto availability.

Post-Fight Tip: Don't Miss the Journal

After defeating Simon, make sure to grab the journal drop. It's key for reaching 100% completion. At this stage, you’re likely finishing up the final parts of the game.

✅ Key Takeaways

Fight Solo with Myel using the Medallum weapon
Focus skills on Stendall and Last Stand
Buff up with Cheater, Shortcut, and damage-dealing Luminas
Phase 1 is easy; Phase 2 requires smart timing with Last Stand
Use Roulette for a lucky 200% damage bonus
Finish Simon without giving him a chance to move

Conclusion: Beat Simon Before He Strikes

Taking down Simon in Clair Obscur: Expedition 33 doesn't need to be a drawn-out fight. With the right Myel build, focusing on high burst damage, solo bonuses, and turn manipulation, you can completely bypass the boss’s mechanics. This strategy lets you go from start to finish in two turns or less, even against the most powerful boss in the game. It's the ultimate way to clean up your endgame content and push toward that 100% completion mark.

Frequently Asked Questions

Q: How do you unlock the Abyss in Clair Obscur: Expedition 33?
A: To unlock the Abyss, you need to gain the Fly ability through the main story and reach level 7 in SK’s relationship. Once both conditions are met, dive underwater in Renoir’s Draft and follow the path to the Golden Tree to find the Abyss entrance.

Q: What is the best build to beat Simon in one hit?
A: The best one-hit strategy uses Myel as a solo fighter with the Medallum weapon at level 33. Maximize agility and defense, use the Stendall and Last Stand skills, and equip powerful Luminas like Cheater and Shortcut to stack damage and gain extra turns.

Q: How much health does Simon have in Clair Obscur?
A: Simon’s first phase has approximately 7–8 million HP, while his second phase can reach around 50 million HP. Both phases require extremely high burst damage to defeat him before he can act.

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