Best Anaxa Build for Honkai Star Rail: Relics, Teams, and Stat Breakpoints

Anaxagoras, widely known by the community as Anaxa, has redefined the Erudition path in Honkai: Star Rail. As a Wind-type character specializing in weakness implantation and massive defense reduction, Anaxa bridges the gap between a pure AOE damage dealer and a tactical utility unit. Unlike traditional Erudition characters who struggle against non-matching elemental weaknesses, Anaxa forces his way through any content by literally rewriting the enemy's vulnerabilities.

Building Anaxa requires a specific understanding of his unique kit, particularly the "Sublimation" state from his Ultimate and the "Qualitative Disclosure" state from his Talent. This guide provides a comprehensive breakdown of the optimal relics, light cones, and team compositions to maximize his potential in both Memory of Chaos (MoC) and Pure Fiction (PF).

Anaxa Quick Build Summary

For those looking for an immediate setup, here is the current meta build for Anaxa:

Best Relic Set: 4pc Genius of Brilliant Stars (Quantum Set)
Best Planar Ornament: 2pc Rutilant Arena
Best Light Cone: Life Should Be Cast to Flames (Signature)
Main Stats: Crit Rate (Body) / Speed (Feet) / Wind DMG (Sphere) / ATK% (Link Rope)
Stat Benchmarks: 80%+ Crit Rate, 2500+ ATK, 134/143 Speed, 100%+ Crit DMG (Base).

Understanding Anaxa’s Core Mechanics

To build Anaxa effectively, you must understand his passive trace: Imperative Hiatus. This trace creates two distinct playstyles:

Hypercarry (Single Erudition): If Anaxa is the only Erudition character in the team, he gains a staggering 140% Crit DMG boost. This shifts his building priority heavily toward Crit Rate.
Dual-DPS (Two+ Erudition): If paired with another Erudition unit (like The Herta or Jade), the team receives a 50% DMG boost. This makes him a premier sub-DPS for follow-up or AOE-heavy teams.

His Talent, Tetrad Wisdom Reigns Thrice, implants random weaknesses based on the number of hits he lands. Because his Skill, Fractal, Exile's Fallacy, is a "Bounce" type attack, he can quickly stack multiple weaknesses on a single target, triggering massive DEF ignore via the Qualitative Shift trace (up to 28% DEF ignore at 7 weakness types).

Best Relics for Anaxa: Why Quantum is King

It might seem counterintuitive to put a Wind-type character on the Genius of Brilliant Stars (Quantum) set, but for Anaxa, it is mathematically superior in high-end content.

1. 4-Piece Genius of Brilliant Stars (Best in Slot for Hypercarry)

The 4-piece bonus allows the wearer to ignore 10% of the enemy's DEF. If the enemy has a Quantum weakness, it ignores an additional 10%.

Why it works: Anaxa's Ultimate, Sprouting Life Sculpts Earth, implants ALL elemental weaknesses (including Quantum) into all enemies. This ensures that Anaxa always benefits from the full 20% DEF ignore during his burst windows. When combined with his signature light cone and talent, Anaxa can reach over 60% total DEF ignore, which scales exponentially in terms of damage output.

2. 4-Piece Eagle of Twilight Line (Best for Sub-DPS/Utility)

If you are playing Anaxa as a sub-DPS alongside The Herta, the Wind set is an excellent alternative.

Why it works: The 25% Action Advance after using an Ultimate allows Anaxa to cycle his turns faster. In Pure Fiction, where turn economy is everything, this helps him re-apply weaknesses and generate energy for the team more efficiently.

3. 4-Piece Scholar Lost in Erudition (Generalist Alternative)

This is a newer set designed specifically for Erudition units. It provides a flat Crit Rate boost and increases Skill and Ultimate damage. It is easier to farm than the Quantum set and offers a more balanced stat spread if you are struggling to hit your Crit Rate thresholds.

Best Planar Ornaments

Your choice of Planar Ornaments should depend on which endgame mode you are prioritizing.

Rutilant Arena: This remains the gold standard for Anaxa. Since his Skill is a Bounce attack that contributes a large portion of his total damage, the 20% Skill DMG bonus is invaluable. However, the 70% Crit Rate requirement is mandatory.
Sigonia, the Unclaimed Desolation: Specifically for Pure Fiction. As Anaxa defeats waves of small enemies, he stacks Crit DMG. Since he is an AOE specialist, reaching the maximum stacks is trivial in PF.
Izumo Gensei and Takama Divine Realm: Only use this in Dual-DPS setups where you are running another Erudition character. It provides a 12% Crit Rate boost, making it easier to reach 100% Crit Rate.

Light Cone Rankings

Anaxa's damage is heavily tied to his Light Cone choice due to the energy requirements of his 140-cost Ultimate.

Life Should Be Cast to Flames (S1 - Signature): This is significantly ahead of other options. It provides Energy Regeneration, massive DMG boost against enemies with implanted weaknesses, and an additional 16% DEF reduction. It solves his energy issues while doubling down on his core mechanic.
Into the Unreachable Veil (S1): A strong second choice that offers Crit Rate and general damage. It doesn't provide the energy utility of his signature but hits hard.
Today Is Another Peaceful Day (S5): As a 140-energy character, Anaxa gets the maximum possible benefit from this Battle Pass light cone. At S5, it provides a 56% flat DMG increase, which is consistently higher than most S1 five-star options.
The Great Cosmic Enterprise (S5 - F2P): The best free-to-play option available via the Herta Store. It provides ATK and Crit DMG based on the number of enemies, perfectly suited for his AOE kit.

Optimal Stat Distribution and Breakpoints

Anaxa is a "Crit Rate Hungry" character. Because his traces provide a massive 140% Crit DMG (in Hypercarry mode), building more Crit DMG has diminishing returns compared to ensuring every single hit of his Bounce skill crits.

Crit Rate: Aim for 85% - 100%. In our testing, an Anaxa with 90% Crit Rate and 150% Crit DMG consistently outperformed an Anaxa with 60% Crit Rate and 280% Crit DMG due to the "all-or-nothing" nature of his multi-hit skill.
Speed: 134 is the minimum for two actions in the first cycle of MoC. If you are running him with a "Turn Advance" support like Sparkle or Bronya, you can opt for ATK% boots instead, provided your support is tuned to 160 Speed.
Attack: Aim for at least 2,500. Anaxa has a high base ATK, so reaching this with an ATK% Link Rope and sub-stats is relatively easy.
Energy Regeneration Rate (ERR): Generally, an ATK% Link Rope is preferred if you have his signature Light Cone or his E1. Without them, you may find his Ultimate rotation sluggish (4-5 turns), in which case an ERR rope might be necessary for a 3-turn rotation.

Team Compositions for Anaxa

1. The "Ultimate Weakness" Hypercarry

Main DPS: Anaxa
Support 1: Sunday (Provides massive energy and Skill Point efficiency)
Support 2: Sparkle or Robin (Crit DMG buffs or Team Action Advance)
Sustain: Huo Huo (Energy battery) or Aventurine (Crit DMG vulnerability)

In this team, Anaxa is the sole Erudition unit, triggering his 140% Crit DMG trace. Sunday is the preferred partner because his kit allows Anaxa to use his Skill more frequently, which is vital for maintaining the "Qualitative Disclosure" debuff on enemies.

2. The Dual-Erudition "Tactical Nuke" Team

Main DPS: Anaxa
Sub-DPS: The Herta
Support: Tribbie or Ruan Mei (All-Type RES PEN and Break Efficiency)
Sustain: Lingsha or Fu Xuan

This team excels in Pure Fiction. Anaxa's ability to implant weaknesses allows The Herta to trigger her follow-up attacks even against enemies that don't naturally have Ice weakness. The 50% team-wide damage boost from Anaxa's trace makes this one of the highest DPS-floor teams in the game.

How to Play Anaxa Effectively

The rotation for Anaxa revolves around his Ultimate. You should aim to:

Use his Technique before entering battle to ensure enemies start with weaknesses already implanted.
Prioritize his Skill on the elite enemy with the most HP to stack the "Qualitative Disclosure" state.
Hold his Ultimate until all enemies are on the field. Using it will inflict "Sublimation," which treats enemies as having all weaknesses. This is the optimal time to unleash your supports' buffs, as Anaxa will ignore the maximum amount of DEF during this window.

Conclusion

Anaxa is a high-investment, high-reward character who thrives on being the center of a team's strategy. By leveraging the Quantum relic set's DEF ignore and focusing heavily on Crit Rate to balance his massive innate Crit DMG, you can transform him into a universal solution for any boss or wave-clear content. Whether you play him as a solo hypercarry or in a dual-DPS shell with The Herta, Anaxa’s ability to manipulate elemental weaknesses makes him a future-proof addition to any roster.

FAQ: Frequently Asked Questions about Anaxa

Is Anaxa better than Argenti or Jing Yuan?

Anaxa offers more versatility because he is not locked into a single element. While Argenti may have higher raw burst against physical-weak enemies, Anaxa’s ability to implant weaknesses makes him significantly better for "off-element" clearing in MoC 12.

Should I pull for Anaxa's E1 or his Signature Light Cone?

His Signature Light Cone, Life Should Be Cast to Flames, is a higher priority. It provides energy regeneration that is difficult to replace with other options and significantly simplifies his build requirements.

Does Anaxa need Break Effect?

No. While he implants weaknesses and reduces toughness quickly, his primary damage scales with ATK and Crit. Break Effect is a secondary benefit rather than a stat you should actively seek on relics.

Can I use Anaxa in the Simulated Universe?

Yes, he is exceptionally strong with the Path of Erudition or the Path of Remembrance. In Remembrance, his Ultimate can help trigger "Dissociation" on enemies that are usually resistant to being frozen by applying the necessary weaknesses first.