Mortenax Blade Best Build, Light Cones & Teams | Honkai: Star Rail

Hi, Trailblazers! The Honkai: Star Rail Version 4.3 “Now I Am Become Blade” Character Event Warp is now live, and the highly anticipated 5-star character Mortenax Blade (Nihility: Fire) has officially arrived. The GamsGo team has also prepared the most comprehensive build guide for you right away!

As a damage-dealing character with a unique combat mechanic, Mortenax Blade can deploy a special Zone to gain all-around enhancements. While the Zone is active, ally targets can inflict DEF-reducing and Vulnerability debuffs on enemies, while also triggering Mortenax Blade’s additional Skill Follow-Up ATK.

Want to unleash his full potential? Keep reading for a complete breakdown of Mortenax Blade’s best Relics, top Light Cones, strongest team compositions, and core skill mechanics!

In addition, if you are also planning to pull for Yao Guang in the current version, don’t miss GamsGo’s exclusive Honkai: Star Rail top-up discounts. Purchase Oneiric Shards here and enjoy special deals of up to 30% off, helping you stock up on Stellar Jade at the best value and bring your favorite characters home with ease!

HSR Mortenax Blade Role Overview

Mortenax Blade is a 5-star Fire character following the Path of The Nihility in Honkai: Star Rail. As a damage-dealing character, he keeps strong offensive potential while providing major team utility through DEF reduction, Vulnerability, and damage amplification.

Mortenax Blade activates the enhanced state Boundless Wrath with his Ultimate and deploys a special Zone. While the Zone is active, ally attacks can charge Mortenax Blade, apply DEF-reducing and Vulnerability debuffs to enemies, and help trigger his additional Skill Follow-Up ATK. Once his Energy is ready, he can unleash a high-HP-scaling AoE Ultimate for burst damage.

Mortenax Blade Basic Info and Rating

The table below gives a quick overview of Mortenax Blade's basic information, combat role, and account value before you decide on his best build, Light Cones, Relics, and team compositions.

Mortenax Blade	Basic Information
	Rarity: 5-Star
	Element: Fire
	Path: The Nihility
	Combat Role: Damage-dealing debuffer with teamwide support value.
	Main Utility: DEF reduction, Vulnerability, DMG increase, special Zone effects, and Skill Follow-Up ATK.
	Best Use: Acheron teams, Ashveil teams, Nihility teams, hypercarry teams, and sustainless damage-focused teams.
	Pull Value: High for players who need a flexible universal debuffer.
	Overall Rating: Excellent generalist Fire Nihility character for debuff-heavy and damage-focused teams.

Mortenax Blade Base Stats

Mortenax Blade has solid HP and high SPD, allowing him to maintain pressure and support the team consistently. The stats below are base values only and do not include Light Cones, Relics, or Trace bonuses.

Is Mortenax Blade Worth Pulling?

Yes, Mortenax Blade is worth pulling if you need a flexible generalist debuffer who can improve your team's overall damage. He provides valuable DEF reduction, Vulnerability, and general damage amplification, making him useful in many different team compositions.

Mortenax Blade is especially strong if you already have characters such as Acheron or Ashveil. These teams benefit greatly from frequent debuff application, and Mortenax Blade can help trigger the negative-effect requirements that many Nihility or debuff-focused damage dealers rely on.

Even if you do not have Acheron or Ashveil, Mortenax Blade still has strong account value. You can pair him with hypercarry supports to help your main DPS deal more damage, or use him in sustainless teams where his increased aggro and teamwide damage contribution can push the team's ceiling higher. Since his kit is broad and future-proof, he may also fit into more teams as new characters are released.

Mortenax Blade's Best Relics and Ornaments

Trailblazers, Mortenax Blade wants Relics that improve both his personal damage and team utility. Since he is a Fire Nihility damage-dealer with strong debuffs, HP, CRIT, SPD, and Energy Regen are all valuable.

His safest setup is Divine-Querying Master Smith with Sprightly Vonwacq. This combination gives him HP, CRIT DMG, teamwide damage support, faster opening turns, and smoother Ultimate uptime.

If you play him in a follow-up team, Eagle of Twilight Line is also excellent. More Ultimates mean more action advances, more turns, more ally hits, and faster charge stacking for Mortenax Blade.

Relic / Ornament	Icon	Rating & Notes
Divine-Querying Master Smith (x4)		★★★★★ - Best Damage Set His best overall set. It gives Max HP, raises CRIT DMG against DEF-reduced enemies, and grants allies Comburent for a 15% DMG boost after he applies DEF reduction.
Eagle of Twilight Line (x4)		★★★★☆ - Best Rotation Alternative Great for follow-up teams. After Mortenax Blade uses his Ultimate, he is advanced forward by 25%, helping him move more often and keep the Zone cycle smoother.
Sprightly Vonwacq		★★★★★ - Best Ornament His best Planar Ornament for rotations. It gives Energy Regen, and at 120 SPD or higher, it advances him by 40% at battle start for faster setup.
Bone Collection's Serene Demesne		★★★☆☆ - Good Damage Alternative A simple damage option. It increases Max HP, and when Mortenax Blade reaches 5000+ HP, it also gives him 28% CRIT DMG.

Relic Guide Summary: Pick Divine-Querying Master Smith if you want the best mix of damage and team support. It improves Mortenax Blade while also helping the whole party hit harder.

Pick Eagle of Twilight Line if your team plays around frequent follow-up attacks. The extra action advance after Ultimate can create a smooth loop where Mortenax Blade and his allies keep feeding each other turns.

For Planar Ornaments, Sprightly Vonwacq is the most comfortable choice. With 120 SPD and enough Energy Regen, Mortenax Blade can open faster, set up debuffs earlier, and use his Ultimate more often.

Mortenax Blade Relic Best Stats

For main stats, Trailblazers should focus on CRIT, SPD, HP, and Energy Regen. His Ultimate already gives 20% CRIT Rate in combat, so try not to overcap CRIT Rate before battle.

Mortenax Blade Recommended Stat Values

For sub-stats, aim for HP% > CRIT Rate > CRIT DMG > SPD. HP keeps his damage stable, while CRIT and SPD make his rotation feel much better.

Mortenax Blade's Best Light Cones

Trailblazers, Mortenax Blade's best Light Cones should improve his HP, Energy cycle, debuff value, or personal damage. Since he supports the team while dealing damage, both utility and DPS stats matter.

Reforged in Hellfire is his best Light Cone. It gives Max HP, fixed Energy recovery once per wave, and a strong CRIT DMG Taken debuff through Purgatory, helping both Mortenax Blade and his allies hit harder.

If you do not pull his signature Light Cone, you still have solid options. Before the Tutorial Mission Starts is great for Energy, while Resolution Shines As Pearls of Sweat adds more DEF reduction.

Light Cone	Rating & Why We Recommend It
Reforged in Hellfire	★★★★★ - Best His signature and best Light Cone. It increases Max HP, restores Energy once per wave, and makes enemies take more CRIT DMG through Purgatory.
Lies Dance on the Breeze	★★★★☆ - Great A strong alternative. It increases SPD and can further reduce enemy DEF through Bamboozle and Theft, making his debuff role even stronger.
Before the Tutorial Mission Starts	★★★★☆ - Best F2P Option A very good 4-star pick. It gives Effect Hit Rate and restores Energy when he attacks DEF-reduced enemies, which fits his own kit well.
Resolution Shines As Pearls of Sweat	★★★☆☆ - Good A useful 4-star debuff option. It can apply Ensnare, reducing enemy DEF further and improving the team's total damage.
Holiday Thermae Escapade	★★★☆☆ - Good A good 4-star choice if you want more damage. It increases Mortenax Blade's DMG and also makes enemies take more damage.
Good Night and Sleep Well	★★☆☆☆ - Usable A personal damage option. It works if you only want to raise Mortenax Blade's own DMG, but it offers less team utility than other choices.

Should You Pull for Mortenax Blade's Light Cone?

Yes, you can pull Reforged in Hellfire if you want to play Mortenax Blade as a stronger DPS. It gives him Max HP, better Energy flow, and a powerful CRIT DMG Taken debuff for the team.

The fixed 20 Energy recovery once per wave is very important. With his high Ultimate cost, this helps him start faster, apply debuffs earlier, and keep his Zone rotation more stable.

The Light Cone also raises his Max HP by 30%, improving his HP-scaling damage. Its Purgatory effect increases CRIT DMG taken by the target, and Mortenax Blade gains extra value from his own CRIT hits.

If you are saving Stellar Jade for future banners, you can skip it. Before the Tutorial Mission Starts works well with Eagle builds, while Resolution Shines As Pearls of Sweat is a solid debuff backup.

Mortenax Blade's Best Teams

Trailblazers, Mortenax Blade works best in teams that attack often. His Zone rewards frequent hits, debuff application, Follow-Up ATKs, and fast Ultimate cycles.

The strongest Mortenax Blade teams usually use Tribbie as the main support and Hyacine as the sustain. Sparkle or Acheron can be used depending on your account.

In most teams, Mortenax Blade provides DEF reduction, Vulnerability, teamwide damage buffs, taunt value, and extra Follow-Up ATK damage. This makes him both a debuffer and a damage driver.

Mortenax Blade Follow-Up Team

This is one of Mortenax Blade's best teams. Ashveil, Tribbie, and Hyacine all help create a smooth cycle of frequent attacks, Follow-Up ATKs, debuffs, healing, and charge generation.

Support	DPS	Support	Sustain
Mortenax Blade	Ashveil	Tribbie	Hyacine

Why it works: Ashveil brings frequent Follow-Up ATKs, Tribbie adds All-Type RES PEN and extra damage, while Hyacine provides fast healing, cleansing, and high attack frequency.

Mortenax Blade benefits greatly from this rhythm. More ally hits mean more charge for him, more debuff triggers, more extra Skill Follow-Up ATKs, and faster team damage output.

Mortenax Blade Nihility Dual-Core Team

This team uses Mortenax Blade with Acheron as a dual-core damage setup. The goal is to stack debuffs quickly, help Acheron charge Slashed Dream, and let both carries burst often.

Support	DPS	Support	Sustain
Mortenax Blade	Acheron	Tribbie	Hyacine

Why it works: Mortenax Blade applies DEF reduction and Vulnerability often. These debuffs help Acheron gain Slashed Dream quickly, making her Ultimate cycle much faster.

This team is especially strong with Acheron at E2, but it still works at E0. Mortenax Blade also adds Ultimate DMG support, which helps Acheron regain strong team value.

Mortenax Blade Hypercarry Team

If you do not have Ashveil or Acheron, you can use Mortenax Blade with Sparkle. This team focuses on action advance, CRIT support, and letting Mortenax Blade deal more damage himself.

DPS	Support	Support	Sustain
Mortenax Blade	Sparkle	Tribbie	Hyacine

Why it works: Sparkle helps Mortenax Blade take more turns and improves his CRIT performance. Tribbie adds Vulnerability and RES PEN, while Hyacine keeps the team stable.

This team is easier to build if you want a single-carry setup. Its ceiling is lower than the Ashveil or Acheron teams, but it is still practical and comfortable.

Mortenax Blade Flexible DPS Teams

Mortenax Blade is a general debuffer, so he can support many main DPS units. Use him when your carry wants Vulnerability, DEF reduction, and teamwide damage increase.

Support	DPS	Support / Flex	Sustain
Mortenax Blade	Archer	Sparkle	Permansor Terrae
Mortenax Blade	The Herta	Welt	Permansor Terrae
Mortenax Blade	Feixiao	Tribbie	Permansor Terrae

These flexible teams are not always his ceiling, but they show why Mortenax Blade is easy to use. He can support many DPS units as long as the team benefits from debuffs and damage amplification.

Mortenax Blade Trace Priority and Kit Analysis

Trailblazers, Mortenax Blade's kit is built around his Ultimate Zone. Once the Zone is active, allies help him apply Balefire Bind, gain Charge, and trigger extra Follow-Up Skill attacks.

His main upgrade priority is Ultimate = Skill = Talent > Basic ATK. Ultimate improves his key debuffs and enhanced state, while Skill and Talent improve his damage and Energy flow.

Mortenax Blade Trace Priority

Trace	Priority & Explanation
Ultimate	★★★★★ - Highest Priority Upgrade this first. It improves Balefire Bind's DEF reduction, DMG received debuff, and Mortenax Blade's CRIT DMG during Infinite Fury.
Talent	★★★★☆ - High Priority Upgrade after Ultimate. Talent raises the Energy he gains from Charge, helping him refresh Ultimate faster in high-hit teams.
Skill	★★★☆☆ - High Priority Upgrade Skill for better AoE and bounce damage. This matters because his extra Skill from Talent counts as a Follow-Up ATK.
Basic ATK	★★☆☆☆ - Low Priority Basic ATK mainly increases damage. It is useful for Energy and Taunt, but its upgrade value is lower than his core Zone tools.

Mortenax Blade Talent Explained

Mortenax Blade's Talent, All Karma Comes Due, is the engine of his kit. During the Zone, every ally attack applies Balefire Bind to the target and gives him 1 Charge.

When Charge reaches 9 and his HP is above 1, he consumes 9 Charge, restores Energy, and gains one extra Skill use. This extra Skill is counted as a Follow-Up ATK.

This means team attack frequency directly decides his rotation speed. Follow-up teams work so well because they create more hits, more Charge, and more extra Skill triggers.

Mortenax Blade Ultimate Explained

Mortenax Blade's Ultimate, Fornax Ex Corpore, applies Balefire Bind to all enemies for 2 turns. This reduces DEF and increases the damage enemies receive.

After that, he consumes 20% of his Max HP, deploys a Zone, and enters Infinite Fury. If his HP is too low, his HP is reduced to 1 instead.

Balefire Bind lasts for 2 turns by itself. It is not tied only to Infinite Fury's countdown, so allies can keep refreshing it through his Talent during the Zone.

Infinite Fury appears on the Action Order with a fixed SPD of 70. When the countdown acts, the Zone ends and Mortenax Blade exits the enhanced state.

During Infinite Fury, he gains CRIT Rate, CRIT DMG, enhanced Basic ATK, unlocked Skill, and a new AoE Ultimate called Tenax Per Ignem.

Ultimate Effect	Explanation
Fornax Ex Corpore	Applies Balefire Bind to all enemies, consumes HP, deploys the Zone, and starts Infinite Fury.
Tenax Per Ignem	The enhanced AoE Ultimate. It costs 160 Energy and deals heavy Fire DMG based on Mortenax Blade's Max HP.

Mortenax Blade Basic ATK and Skill

Outside Infinite Fury, Mortenax Blade cannot use Skill. His Basic ATK becomes his main Energy tool and also applies Taunt for 1 turn, helping him take hits for more Energy.

His enhanced Basic ATK deals higher Fire DMG based on Max HP. It still applies Taunt, so it supports both damage and his self-charging rhythm.

His Skill is an AoE attack that costs no Skill Points. It consumes 10% Max HP, hits all enemies, then adds 4 random bounce hits based on his Max HP.

Ability	How It Works
A Broken Blade Still Slays	Normal Basic ATK. Deals single-target Fire DMG based on Max HP and Taunts the target for 1 turn.
A Tempered Blade Severs Souls	Enhanced Basic ATK. Deals higher Max HP-scaling Fire DMG and keeps the same 1-turn Taunt effect.
A Rain of Blades Seals Fate	AoE Skill. Costs HP, not Skill Points, and can only be used during Infinite Fury while his HP is above 1.

Mortenax Blade Bonus Abilities

Mortenax Blade's three Bonus Abilities are very important. They improve Energy overflow, survivability, taunt value, team damage, and his role in Nihility teams.

Bonus Ability	Why It Matters
Bone, Hardened ad Nauseam	Highest priority. It stores up to 80 overflow Energy, refunds Energy after Ultimate, and sets Energy to 75% at battle start or when the Zone ends.
Soul, Tempered ad Mortem	High priority. During the Zone, it raises his chance of being hit, gives 50% damage reduction, boosts healing, and grants Charge after being attacked.
Heart, Refined ad Infinitum	Highest priority. It gives allies 50% DMG during the Zone, plus 75% Ultimate DMG if another Nihility ally is on the team.

Mortenax Blade Technique

Mortenax Blade's Technique, Blade's Reach Spares None, attacks nearby enemies before battle. After entering combat, all enemies are Taunted for 1 turn.

It also reduces his damage taken by 90% for 2 turns. This makes his opening safer and helps him attract enemy attacks for Energy and Charge setup.

Technique	Gameplay Value
Blade's Reach Spares None	Opens with a wide attack, Taunts all enemies for 1 turn, and gives Mortenax Blade 90% damage reduction for 2 turns.

Mortenax Blade Gameplay Guide

Start by using Ultimate to deploy the Zone. This activates Infinite Fury, applies Balefire Bind, and turns Mortenax Blade into both a debuffer and damage dealer.

During the Zone, let allies attack as often as possible. Every hit helps refresh Balefire Bind, build Charge, and push Mortenax Blade toward his extra Follow-Up Skill.

If another Nihility character is on the team, Heart, Refined ad Infinitum gives the party a major Ultimate DMG boost. This is why Acheron teams value him so much.

If no other Nihility ally is present, the Bonus Ability instead gives Mortenax Blade extra personal damage. This makes him more reliable in hypercarry-style teams.

Mortenax Blade Eidolons

Trailblazers, Mortenax Blade has strong Eidolons for both personal damage and team damage. His best stopping point is E2, especially if you use follow-up teams.

E1 gives a clean damage boost, E2 changes how the whole team plays, E4 adds more teamwide damage, and E6 pushes his Charge cycle and enhanced Ultimate damage much higher.

Recommended Mortenax Blade Eidolons

Eidolon	Why We Recommend It
E1 Ere My Death, I Stood Unmade	★★★★☆ - Great Reduces all enemies' All-Type RES by 20% during the Zone. His extra Skill also delays the Infinite Fury countdown by 15%.
E2 Ash Was My Heart, Yet the Flame Stayed	★★★★★ - Best Stopping Point Makes ally damaging Ultimates count as Follow-Up ATKs, gives allies 75% Follow-Up ATK DMG, and lowers his Charge requirement to 7.
E4 Odium I've Smitten, Thence Came the Blade	★★★★☆ - Great Further increases the teamwide DMG bonus from Heart, Refined ad Infinitum by 50%. It is simple, strong, and always useful.
E6 If Immortality Could Die, I Swore THEM Slain	★★★★★ - Whale Upgrade Gains Charge when taking damage or consuming HP during the Zone. Tenax Per Ignem also reaches 150% of its original multiplier.

All Mortenax Blade Eidolons

If you only want value, E2 is the best stopping point. It improves team damage, follow-up synergy, Ultimate interactions, and Mortenax Blade's Charge cycle at the same time.

Eidolon	Effect
E1	Ere My Death, I Stood Unmade During the Zone, all enemies lose 20% All-Type RES. After his Talent extra Skill, Infinite Fury's countdown is delayed by 15%.
E2	Ash Was My Heart, Yet the Flame Stayed Ally damaging Ultimates count as Follow-Up ATKs. Allies gain 75% Follow-Up ATK DMG, and his Charge limit drops to 7.
E3	Across the Shore, Wrath Laid Bare Ultimate Lv. +2 and Talent Lv. +2. This is a standard scaling Eidolon that strengthens his core Zone and Charge tools.
E4	Odium I've Smitten, Thence Came the Blade Heart, Refined ad Infinitum gives allies another 50% DMG dealt. It is a direct teamwide damage increase.
E5	I Severed My Woes, Knowing Death Begets Life Skill Lv. +2 and Basic ATK Lv. +1. This mainly improves his direct damage, especially during Infinite Fury.
E6	If Immortality Could Die, I Swore THEM Slain During the Zone, taking damage or consuming HP gives 1 Charge. Tenax Per Ignem's multiplier rises to 150% of its original value.

How to Get Mortenax Blade

Mortenax Blade is available from the limited Character Event Warp, Now I Am Become Blade, in Honkai: Star Rail Version 4.3.

His banner starts after the Version 4.3 update on June 1, 2026 server time and runs until June 24, 2026 at 11:59 server time.

If you plan to pull for Mortenax Blade, you can top up Honkai: Star Rail Oneiric Shards through GamsGo. GamsGo offers exclusive recharge deals with discounts of up to 30%.

Mortenax Blade Ascension and Trace Materials

Trailblazers, here is a quick farming checklist for Mortenax Blade. He uses the Whimsy Wax series, Radiant Prominence, the Phagousa Trace series, Vanquished Flow's Reticence, Tracks of Destiny, and Credits.

If you want to build him fast, prepare his Character Ascension materials first. Then farm Nihility Trace materials for his Ultimate, Talent, and Skill.

Total Materials Needed for Mortenax Blade

These are the main materials needed to raise Mortenax Blade and unlock his important Traces.

Whimsy Wax ×56	Dreamweave Steel ×71	Lucid Awl ×73	Radiant Prominence ×65
Tear of Phagousa ×18	Wine of Phagousa ×69	Heart of Phagousa ×139	Vanquished Flow's Reticence ×12
Tracks of Destiny ×8	Traveler's Guide ×290	Credit ×3,888,000

Mortenax Blade Ascension Materials Total

These are the materials needed to level Mortenax Blade from 1 to 80.

Whimsy Wax ×15	Dreamweave Steel ×15	Lucid Awl ×15	Radiant Prominence ×65
Traveler's Guide ×290	Credit ×888,000

Mortenax Blade Trace Materials Total

These materials are used for Mortenax Blade's Basic ATK, Skill, Ultimate, Talent, Bonus Abilities, and stat nodes.

Tear of Phagousa ×18	Wine of Phagousa ×69	Heart of Phagousa ×139	Vanquished Flow's Reticence ×12
Whimsy Wax ×41	Dreamweave Steel ×56	Lucid Awl ×58	Tracks of Destiny ×8
Credit ×3,000,000

Reforged in Hellfire Light Cone Materials

If you also want to level Mortenax Blade's signature Light Cone, prepare these extra materials.

Whimsy Wax ×20	Tear of Phagousa ×4	Wine of Phagousa ×12	Dreamweave Steel ×20
Heart of Phagousa ×15	Lucid Awl ×14	Credit ×385,000

How to Get Mortenax Blade Materials

Trailblazers, these are the main farming locations for Mortenax Blade's Ascension and Trace materials. Use this table as your quick farming route.

Material Source	How to Get It
Radiant Prominence	Radiant Prominence can be farmed from Shape of Ashes: Stagnant Shadow in Sanctum of Prophecy Janusopolis. You can also exchange other boss materials for Radiant Prominence through the Synthesizer.
Tear of Phagousa Series	Tear of Phagousa, Wine of Phagousa, and Heart of Phagousa come from Calyx Crimson: Bud of Nihility. These are Mortenax Blade's main Nihility Trace materials, so farm them early if you plan to level his Ultimate, Talent, and Skill.
Vanquished Flow's Reticence	Vanquished Flow's Reticence is obtained from Echo of War. Save your weekly attempts if you plan to max Mortenax Blade's core Traces and Bonus Abilities.

Conclusion

That wraps up our Mortenax Blade guide, Trailblazers! His kit may look complex at first, but the core idea is simple: deploy the Zone, let allies attack often, stack Charge, and keep Balefire Bind active.

For most players, focus on Ultimate, Talent, and Skill first. Build enough HP, CRIT, SPD, and Energy Regen to keep his rotation smooth, then choose teams that can attack frequently.

Follow GamsGo for more Honkai: Star Rail guides, practical build tips, and money-saving top-up deals. We will keep bringing you useful strategies and discount updates.

FAQ

How much SPD does Mortenax Blade need?

Aim for at least 120 SPD if you use Sprightly Vonwacq. For faster rotations, 134 to 160 SPD is a good target, especially in teams that want frequent Ultimates.

Should Mortenax Blade use HP% or Fire DMG Sphere?

HP% is safer and more consistent because his damage scales with Max HP. Fire DMG Boost is better if you already have enough HP and want more personal damage.

What Trace should I level first for Mortenax Blade?

Level his Ultimate first, then Talent and Skill. Basic ATK can be upgraded later because it mainly increases damage and is less important than his Zone effects.

Is E2 Mortenax Blade a good stopping point?

Yes. E2 is his best stopping point for spenders. It lowers his Charge requirement and makes ally damaging Ultimates count as Follow-Up ATKs, greatly improving team synergy.

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