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
Leveling your Arc through Enhancement is the most direct upgrade route. This process eats through development materials called Dye plus Beetle Coins. Both costs climb as the Arc's level goes up, so pushing from level 40 to 50 demands noticeably more resources than the earlier tiers.
Your main Dye source is the Kaleidoscope stage inside Houdinii's Magic Stage Anomaly Zone, which sits in Bridge Crossings. Running it costs Character Pixels (the stamina resource) and drops large amounts of Dye. Farm it whenever your Character Pixels are near cap. You can also grab Dye through exploration rewards and the Hunter Exchange, which opens at Tycoon Rank 6 if you need materials right away without waiting on stamina refills.
Arc development menu overview
How to ascend an Arc's level cap
Arcs slam into a hard ceiling at each tier, and you can't break through without Ascending. Each Ascension adds 10 more levels, with level 80 being the maximum an Arc can reach. Ascension also requires a prerequisite: your Appraisal Level (tied to Hunter Rank) has to meet the threshold before the option shows up.
Ascension Materials are separate from Dye. The primary source is the Bubble Can Factory Anomaly Zone, which also burns Character Pixels when you farm it. Like Dye, these materials show up in the Hunter Exchange as a backup option. The Ascension option itself lives right inside the Arc → Develop screen, so there's no separate menu to hunt down.
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.
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 don't show up in standard banner rotations and are locked behind specific quests instead. The Day Off Arc is a notable example—it's widely recognized as Esper Zero's best-in-slot option but won't appear in any gacha pool.
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.