The moment I laid eyes on Chief Justice Neuvillette in the grand halls of Fontaine's opera house, I knew I had to have him on my team. It was 2025, and the hype around his release was unlike anything I'd seen since the Raiden Shogun. As a seasoned Traveler who had journeyed from Mondstadt to the depths of the Chasm, I thought I was prepared for the grind. Oh, how naive I was. Preparing Neuvillette for battle would become one of my most memorable adventures in Teyvat.

The Ascension Odyssey Begins

Like all Fontaine characters released after the 4.0 update, Neuvillette demanded materials unique to his homeland. The ascension formula was familiar - gemstones, Mora, regional specialties, and boss drops - but the specifics were a fresh challenge. My first target was the Lumitoile, those beautiful blue-shelled creatures that clung to the underwater cliffs of the Fontaine region. I spent days swimming through the new aquatic zones, my character's oxygen bar becoming my constant companion. The Lumitoile weren't just collectibles; they were Neuvillette's connection to the hydro-powered civilization he presided over.

As I gathered these delicate creatures, I couldn't help but appreciate how the game had evolved. The underwater exploration mechanics added in Fontaine made resource gathering feel less like a chore and more like genuine discovery. Each Lumitoile location told a story about the ecosystem of this justice-obsessed nation.

Confronting the Fontemer Aberrants

The Transoceanic materials presented a different kind of challenge. These pearls, chunks, and crystals dropped from the new Fontemer Aberrant enemies that patrolled Fontaine's waters. I found myself battling these peculiar creatures across the region:

• Transoceanic Pearl: Common drops from weaker Aberrants

• Transoceanic Chunk: Required defeating more advanced variants

• Xenochromatic Crystal: Only the strongest Aberrants yielded these

What struck me was how these enemies reflected Fontaine's themes - creatures born from polluted waters, representing the environmental consequences of an industrialized society. Defeating them felt like participating in Neuvillette's own mission to maintain balance in his nation.

The Boss Battle: Emperor of Fire and Iron

Then came the real test - the Fontemer Unihorn from the Emperor of Fire and Iron world boss. This mechanical behemoth in the Fontaine Research Institute ruins tested every combat skill I'd developed over years of playing. The boss's dual elemental nature meant I needed to constantly adapt my team composition and strategy.

I still remember my first victory - watching that beautiful horn materialize in my inventory, knowing I was one step closer to unleashing Neuvillette's full potential. The 20 horns needed for final ascension represented weeks of careful planning and execution.

The True Cost of Power

As I progressed through the ascension phases, the material requirements escalated dramatically:

Phase	Max Level	Mora	Lumitoile	Boss Horns
1	40	20,000	3	0
2	50	40,000	10	2
3	60	60,000	20	4
4	70	80,000	30	8
5	80	100,000	45	12
6	90	120,000	60	20

But ascension was only half the battle. Leveling him from 1 to 90 required a mountain of resources:

• 404 Hero's Wit

• 35 Adventurer's Experience

• 12 Wanderer's Advice

• 1,671,600 Mora for leveling alone

When I added the 420,000 Mora for ascension, the total cost reached a staggering 2,091,600 Mora. I found myself running Ley Line blossoms more times than I could count, watching my resin disappear into golden clouds of currency.

Mastering His Talents

Neuvillette's unique playstyle as a catalyst user demanded special attention to his talents. His charged attack mechanics were unlike anything I'd experienced - a sustained beam of hydro power that drained his HP to deal massive damage. To maximize this potential, I needed to farm Talent Books of Equity from Fontaine's domain.

The grind followed a familiar but no less demanding pattern:

• Teachings of Equity: Basic understanding

• Guide to Equity: Deeper mastery

• Philosophies of Equity: Complete enlightenment

Each level required increasing amounts of these books and those Transoceanic materials I'd grown so familiar with. But the real bottleneck came at talent levels 7-10.

The Weekly Ritual: Apep's Oasis

Every Monday, I found myself returning to Sumeru's desert, specifically to The Realm of Beginnings domain. Here, I faced the Guardian of Apep's Oasis, hoping for that precious Everamber drop. This weekly boss material was essential for advancing Neuvillette's talents beyond level 6.

The randomness of the drop was maddening. Some weeks I'd get the Everamber I needed; other weeks I'd receive different materials, forcing me to use Dream Solvent for conversion. This weekly ritual became part of my Genshin Impact routine, a pilgrimage to power up my beloved Chief Justice.

The Crown of Insight

For that final push to talent level 10, I needed the rarest material of all: the Crown of Insight. I had been hoarding these from limited-time events, the Frostbearing Tree in Dragonspine, the Sacred Sakura in Inazuma, and the Tree of Dreams in Sumeru. Each Crown represented months of gameplay, special achievements, and participation in Teyvat's evolving story.

Using one on Neuvillette felt significant - a commitment to making him a centerpiece of my team for the foreseeable future.

Reflections on the Grind

As I write this in 2026, looking back on those months of preparation, I realize something important. The journey to ascend Neuvillette wasn't just about collecting materials; it was about experiencing Fontaine through his lens. Each Lumitoile gathering trip taught me about his nation's ecology. Each battle with Fontemer Aberrants connected me to the environmental struggles he faced as Chief Justice. Each visit to the talent domain reflected his dedication to the principles of Equity.

The resource requirements, while demanding, served a purpose beyond mere gameplay mechanics. They forced engagement with every aspect of Fontaine's content, from underwater exploration to world boss battles to weekly challenges. In a game as vast as Genshin Impact, these material gates ensure players don't just rush through content but truly live in each region.

Now, with Neuvillette at level 90, talents crowned, and equipped with his best artifacts and weapons, he stands as the cornerstone of my Fontaine exploration team. The hundreds of hours invested have paid off every time his charged attack decimates a field of enemies or when his judicial authority turns the tide in Spiral Abyss.

For new players embarking on this journey today, my advice is simple: embrace the grind. Each material gathered, each boss defeated, each domain completed isn't just checking boxes on an ascension checklist. It's writing your own story in Teyvat, one where you and the Chief Justice of Fontaine become legends together.