Arcs are the weapon system in Neverness to Everness, and they do more than just raise your ATK stat. Every Arc carries a passive ability tied to its Mixing Intensity, and the right Arc on the right character can push your damage output or Break potential significantly higher. Getting your Arcs to a competitive level requires three separate systems: enhancing their level, ascending their level cap, and mixing duplicates to strengthen their passive. Each system needs different materials and currencies, so understanding all three early saves you a lot of wasted stamina later.
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How to increase an Arc's level
The most straightforward upgrade path is leveling your Arc through Enhancement. This consumes development materials called Dye alongside Beetle Coins. Both costs scale up as the Arc's level increases, so the jump from level 40 to 50 costs noticeably more than the earlier brackets.
The primary farming spot for Dye is the Kaleidoscope stage inside Houdinii's Magic Stage Anomaly Zone, located in Bridge Crossings. Clearing it spends Character Pixels (the stamina resource) and returns large quantities of Dye. Run it whenever your Character Pixels are close to cap. Dye can also be picked up through exploration rewards and the Hunter Exchange, which unlocks at Tycoon Rank 6 if you need materials immediately without waiting on stamina.
Arc development menu overview
How to ascend an Arc's level cap
Arcs hit a hard ceiling at each tier, and you cannot push past it without Ascending. Each Ascension unlocks 10 additional levels, and the maximum an Arc can reach is level 80. Ascension also has a prerequisite: your Appraisal Level (linked to Hunter Rank) must meet the threshold before the option becomes available.
Ascension Materials are a separate resource from Dye. The main source is the Bubble Can Factory Anomaly Zone, which also costs Character Pixels to farm. Like Dye, these materials appear in the Hunter Exchange as a fallback option. The Ascension option itself sits directly inside the Arc → Develop screen, so there is no separate menu to navigate.
Ascending Arc level cap
How does Arc Mixing work?
Mixing is what separates a serviceable Arc from a fully optimized one. When you feed a duplicate copy of an Arc into the Mixing system, you raise its Mixing Intensity tier, which directly improves the Arc's passive skill ratios and other bonuses.
The scale runs from T1 (base) up to T5, which is the maximum. Reaching T5 requires a total of 5 copies of the same Arc: the original plus 4 duplicates consumed through Mixing.
Do not rush Mixing in the early game. If you mix your only copies of an Arc before you have enough characters to equip it, you will leave roster slots running weaker weapons than necessary. Build up your character roster first, then invest duplicates.
For players wondering which Arcs are actually worth investing in, the NTE Arcs tier list breaks down every Arc from S to C tier with clear explanations of what each one does.
How do you obtain Arcs?
Most Arcs come from the gacha system, called Scarborough Fair, using Dice or Annulith. The Arc Research Program is a separate pull system where every 8 pulls guarantees the featured UP Arc, with each pull costing 10 Tri-Keys.
The Arc Shop inside the Mall offers two exchange options: Arc Selection for an S-rank Arc at 25 Tri-Keys, and Arc Exchange using Mhm! Coins or U-00NE for S-rank and A-rank Arcs respectively. Tri-Keys come from Annulith processing and the Hunter Exchange. Mhm! Coins are earned at Nacupeda's Pond, while U-00NE drops from Anomaly content.
Some Arcs are also hidden behind specific quests. The Day Off Arc, which is considered Esper Zero's best option according to community documentation on GameWith, is one example of an Arc that does not appear in any standard banner rotation.
Event rewards occasionally include Arcs or the currencies needed to pull for them. Finishing active events before they expire is one of the more reliable ways to build up Arc inventory without spending stamina on farming runs.
Which Arcs should you prioritize upgrading?
Not every Arc deserves the same investment. Signature Arcs built for specific characters (like those for Nanally, Esper Zero, Sakiri, and Daffodill) tend to have passive effects designed around that character's kit, making them the highest-priority upgrade targets. Generic Arcs work fine as placeholders, but their Mixing bonuses rarely match what a signature Arc provides at the same tier.
For a broader look at progression systems across the full roster, the Neverness to Everness strategy guides collection covers everything from team building to individual character builds in one place.