Mortenax Blade in Honkai Star Rail: Build Guide and Best Teams

Mortenax Blade is a legendary follower of the Void in HSR, who successfully fulfills several roles at once: dealing decent damage as a damage dealer, applying debuffs as a debuffer, and absorbing enemy attacks as a tank. All of his skills rely on HP, so the build emphasizes this stat.

The main mechanic is the super ability: the swordsman spends health to create a zone and enter a special state, reminiscent of the ultimate. Firefly's "huntresses"He achieves the best synergy with damage dealers in the Void thanks to Last Trace and frequently attacking characters, allowing him to quickly build up his talent charges.

How to Get the Character

Blade of the Path of Nothingness can be dropped in the "Event Jump" of the first half of version 4.3 - 1 June 2026The banner will last until June 23rd inclusive.

Strengths and Weaknesses

Thanks to its versatility, Stellaron Hunter fits easily into a variety of teams. However, its Ultimate reliance requires careful energy management, and its talent mechanics require a specific type of teammate.

The Best Mortenax Blade Builds in HSR

A versatile hero, Blade (Fire) can serve as both a support debuffer and a damage dealer. Regardless of his chosen role, his core build follows these key parameters:

• health (HP), which determines your ability percentage and survivability. If this indicator drops to one, you won't be able to use the E-type (it consumes HP);
• speed for frequent actions and increased overall efficiency.

To maximize personal damage you will need crit и fire damage bonusEnergy regeneration is usually sufficient with a suitable team and regular damage, but in a pinch, you can equip gear or a connecting rope with this stat.

Light Cone Rating

Weapons that provide HP, speed, and team buffs are a priority. If a swordsman is focused on eliminating enemies, combat cones are worth considering.

Light cone	Description	Recommendation
Reborn in Flame ⭐⭐⭐⭐⭐ HP 58-1270 ATK 22-476 DEF 21-463	Max HP +30-60%At the start of each wave, 20 energy is restored. After the user uses the skill, the enemy enters "Purgatory" for 2 turns. In this state, the target's damage received is increased by 30-60% and the damage from the owner's critical hits increases 30-60%.	A versatile option for both dealing damage and supporting allies. Additionally, the signal boosts health, allowing for high stat values.
Lies Dance on the Breeze ⭐⭐⭐⭐⭐ HP 43-953 ATK 26-582 DEF 24-529	Speed ​​+18-30%When you hit an enemy, there is a base 120% chance to inflict the "Trick" status on them, reducing their defense by 16-24% 2 moves. If your speed is above 170, there is a base 120% chance that the Steal status will be applied to all enemies, further reducing their defense by 8-12% for 2 turns. Only one effect can be active at a time. The most recently applied status is considered active.	A support cone with increased speed and decreased defense. However, you'll need to build up a 39% hit rate to deal negative status effects.
Before the Tutorial Mission Starts ⭐⭐⭐⭐ HP 43-952 ATK 21-476 DEF 15-330	Chance to hit effects +20-40%When the owner attacks a target with reduced defense, the 4-8 energy.	An easy to implement cone that can be equipped in place of the signal when a shortage of VE occurs, provided that the ultimate zone is maintained at all times.
Resolution Shines As Pearls of Sweat ⭐⭐⭐⭐ HP: 43-952 ATK: 21-476 Defense: 15-330	When the owner attacks an enemy without the "Catch" status, a basic chance occurs 60-100% apply this effect. The enemy's defense will be reduced by 12-16% for 1 turn.	Provides an additional defense bonus. The main drawback of this "card" is that you'll have to seek out high hit rate effects (67%) at the expense of higher-priority stats.
Adventures in the Bathhouse ⭐⭐⭐⭐ HP 48-1058 ATK 24-529 DEF 15-330	Damage dealt +16-32%Attacks have a 100% base chance to apply Weakness, which increases damage taken by 10-16% for 2 turns. Similar effects do not stack.	Suitable for a sub-DD role, as it simultaneously increases damage to both the hero and the team. Like Resolve, it requires building a SPE.
Along the Passing Shore  ⭐⭐⭐⭐⭐ HP 48-1058 ATK 28-635 DEF 18-369	Crete. damage +36-60%. Upon hitting, inflicts the Mirage status on the enemy for 1 turn. The effect only occurs once per hit. Damage dealt with Mirage is increased by 24-40%, and the ult is strengthened by 24-40%.	An optimal weapon for enhancing a character's damage-dealing role. It only requires the use of any skills to activate the effect.
Good Night and Sleep Well ⭐⭐⭐⭐ HP 43-952 ATK 21-476 DEF 15-330	Damage dealt +12-24% for each debuff applied to an enemy. The boost stacks up to 3 times and applies to periodic status effects.	An alternative in the DD position. The hero is able to realize a passive bonus thanks to the presence of negative statuses.
Boundless Choreo ⭐⭐⭐⭐ HP 43-952 ATK 21-476 DEF 15-330	Critical Chance +8-16%Critical damage is increased by 24-48%, if the owner attacks enemies with reduced defense or the "Slow" status.	A great option for balancing crits. The constant reduction in defense will increase your damage output.

What relics and ornaments are needed

The choice of artifacts depends on the functions performed, the desired stats, or the squad composition. The Blacksmith's personal set is optimal in most situations, but in the early stages, the Twilight Reach Eagle or the Long-Lived Apprentice are quite suitable.

Cavern relics

Set and its effects	Recommendation
The Skyward Blacksmith 2 parts: max HP +12%. 4 parts: Critical damage dealt to enemies with reduced defense is increased by 28%. When the owner weakens an enemy's defense, all allies are afflicted with the "Sustained Fire" status for 2 turns. This bonus does not stack. Damage dealt by heroes with this status is increased by 15%. The buff reactivates after an attack.	The new Blade's signature kit. This passive is suitable for both unit and teammate buffs. The conditions are met seamlessly during rotation.
Eagle of Twilight Line 2 parts: wind bonus +10%. 4 parts: The ult moves the action forward by 25%.	It will increase the number of actions performed within the cycle. However, for maximum effectiveness, the ultimate should be triggered almost continuously.
Longevous Disciple 2 parts: max HP +12%. 4 parts: When the wearer takes an incoming hit or their health is consumed by an ally or themselves, their critical chance is increased by 8% for 2 turns. This buff stacks up to 2 times.	An alternative with increased health. The Swordsman consumes HP with an ability or ultimate, and is also regularly hit by enemy attacks, activating a passive effect.
Pioneer Diver of Dead Waters 2 parts: Increases damage dealt to enemies with debuffs by 12%. 4 parts: Critical Chance +4%. The owner's critical damage dealt to enemies with at least 2/3 debuffs is increased by 8%/12%. When a negative status is applied, the bonuses are increased by 100% for 1 turn.	If you have this set with good stats, you can equip it as a damage dealer. It will increase critical hits and overall damage.
Scholar Lost in Erudition 2 parts: crit chance +8%. 4 parts: Increases skill and ultimate ability by 20%. After using the ultimate, the damage of the next skill is increased by 25%.	The hero primarily attacks with his skill and enhanced ultimate, so he'll take advantage of the set's benefits. The crit chance bonus won't hurt either.
Guard of Wuthering Snow 2 parts: Damage taken reduction +8%. 4 parts: If HP is below or equal to 50% at the start of the turn, 8% HP and 5 energy are restored.	A set for when the Stellaron Hunter is playing on a team without healers. The character will not only become stronger, but also gain additional energy and the ability to heal independently.

The sets discussed above can be combined, that is, two parts can be installed until the main set is assembled.

Planar ornaments

Set and its effects	Recommendation
Bone Collection's Serene Demesne 2 parts: Max HP +12%. When the owner's health is equal to or exceeds 5,000 units, critical damage and the damage bonus of their Memory Spirit are increased by 28%.	The best choice among decorations due to the bonus to health and damage. Since the swordsman's skills depend on this stat, it is capable of fulfilling the 5,000 HP requirement.
Sprightly Vonwacq 2 parts: Energy regeneration +5%. If your speed is greater than or equal to 120, its effect is advanced by 40% at the start of the battle.	A set for support or energy management. Personal damage will be lower, but this is compensated by a more consistent rotation—especially when there are few attacking allies or enemies rarely attack.
Lushaka, the Sunken Seas 2 parts: Energy regeneration +5%. If the wearer is not the first ally in the group, the attack power of the first ally is increased by 12%.	A support kit with a recharger for the ultimate. Considered exclusively for groups where the hyper-carry's skills depend on attack power.
Inert Salsotto 2 parts: Critical Chance +8%. If Critical Chance is 50% or more, the damage of the super ability and bonus attack is increased by 15%.	A decent starting loadout. While the Ultimate's zone is active, the skill is considered a bonus hit, so all buffs are beneficial.
Duran, Dynasty of Running Wolves 2 parts: Whenever a partner performs a bonus attack, the owner gains 1 stack of Feat (maximum 5). Each stack increases this attack type by 5%. Upon reaching level 5, the damage bonus increases by 25%.	The set opens with other characters using non-aggressive abilities. This will allow you to gain maximum stacks and further increase your critical hit rate.

Recommended Stats

The following key parameters are a priority:

In the lower stats the following are desirable:

HP > Speed ​​> Crit > Defense/Stat Resistance

Final stat values ​​before entering combat:

• HP: 6 units and higher.
• CRIT Rate: 80%.
• CRIT DMG: 120% and more.
• effect hit rate: 39% (weapon condition "Lies Flying on the Wind") or 67% (cones "Determination Glitters Like Pearls of Sweat", "Adventures in the Bathhouse");
• speed: 141 units - guaranteed 2 turns during the enhanced state/zone (minimally — 134 units). With a 100% turn advancement, it can reach 120–128 units.

It's important: The lower the speed, the more critical the timely use of boosting skills is. Therefore, it's important to time the activation of effects and the order of actions.

Mortenax Blade's Squad Guide in XSR

In a team, Mortenax Blade serves as a debuffer, tank, and damage dealer. Thanks to his versatile nerfs and unique skills, he's useful in a variety of scenarios. For example, he's ideal for groups that deal damage over time or damage.

The "Forged Heart" trait enhances superpowers when other followers of the Void are present, making it ideal for pairing with heroes like Emanator Acheron. It also interacts with units from the bonus attack, but the full synergy only unlocks at E2.

Which characters are suitable?

The hero isn't tied to specific builds and will be a reliable debuffer for damage dealers who require a direct damage boost. At the same time, certain units synergize particularly effectively with the Stellaron Hunter's mechanics:

Character	Features
Acheron (Nihility: Lightning)	She requires representatives of the Path of Nothingness to fully utilize the "Abyss" effect and quickly accumulate charges of "Severed Dream." A swordsman meets all the requirements and will also enhance the girl's superpower—her main skill.
Ashvale (Hunt: Electric)	The characters mutually buff and complement each other's mechanics: together, they reduce enemy defense by up to 70% and increase the team's damage. Furthermore, the detective's regular attacks charge the Hunter talent, causing it to constantly deal area-of-effect damage with bonus attacks.
Feixiao (The Hunt: Wind)	The heroine deals damage with her bonus attack and similarly relies on her teammates to consistently land attacks to gain Winged Beast charges. She's typically placed as the third damage dealer in a group with Ashvale.
Tribbie (Harmony: Quantum)	The best support, as she actively attacks enemies, building stacks for her talent, and applies universal buffs. She can also equip the "Dance! Dance! Dance!" cone for additional movement.
Cipher (Nihility: Quantum)	Similar in functionality to Tribby, but more focused on single targets. It also reduces damage dealt by enemies with a skill, providing greater survivability.
Hyacine (Remembrance: Wind)	She provides healing and increases HP, which is valuable for a swordsman who relies on this stat. At the same time, the demigoddess deals damage, making her the most optimal healer in a group.
Lingsha (Abundance: Fire)	Another good option for a healer, thanks to its area-of-effect bonus attack. The "Foggy" status, which increases penetration damage, is also useful in some builds.
Huohuo (Abundance: Wind)	A free healer will be a viable alternative if Hyacin or Linsha are unavailable. The main advantage of the trainee judge is a third-party method of generating VE, which will help charge the superpower faster.

Team samples

The Stellaron Hunter can be part of the following teams:

Character 1	Character 2	Character 3	Character 4
Acheron	Mortenax Blade	Silver Wolf Tribbie	Hyacine Lingsha
Acheron	Mortenax Blade	Ashveil Cipher	Welt
Mortenax Blade	Ashveil	Feixiao	Hyacine Tribbie
Mortenax Blade	Ashveil Sunday	Tribbie	Hyacine Lingsha
Castorice	Evernight	Mortenax Blade	Hyacine
Hysilens	Kafka	Swan Huohuo	Mortenax Blade
Evanessa	Main character (Joy)	Yao Guang	Mortenax Blade
Firefly	The Dahlia	Fugue Lingsha	Mortenax Blade
Examples of F2P teams
Mortenax Blade	Serval	Asta Pela	March 7 (Save) Huohuo
Ratio	Mortenax Blade	Topaz	Permansor Terrae

Leveling

Materials for maxing out the Blade of Nothingness:

How Mortenax Blade's skills work

The swordsman's abilities combine various mechanics:

• Applying debuffs while the ultimate's area is active;
• inflicting damage in an enhanced form of a superpower, including a bonus attack;
• taking on enemy attacks.

When using enhanced skills, the hero consumes some of their own health. However, while the ultimate is active, they cannot die, ensuring high survivability coupled with HP scaling.

Active skills

During combat, the Stellaron Hunter uses the following skills:

• technique - at the beginning of the battle, it casts a "Taunt" on the opponents, which attracts their attacks;
• normal and enhanced b/a - attacks one mob and applies "Taunt" again;
• Skill - Spends health to deal damage to all targets. Finally, performs 4 hits, targeting one random enemy;
• Superpower - a primary skill that weakens enemies and activates an enhanced state with increased stats.
• Enhanced Ultimate - Multiple area damage.

Passive ability

The passive allows you to perform bonus hits when receiving frequent attacks from allies.

Skill leveling order

Super Ability > Talent = Skill > Basic Attack

First, it's worth pumping up ultimate, since it affects debuffs and increases K/U during the zone's duration, and the enhanced version deals a lot of area damage. It is then recommended to gradually increase the levels talentto get more energy from the charges, and of the skill, which is an additional source of damage. The basic attack is less of a priority, but is still sometimes used in rotation.

Traces

Stellaron Hunter Talent Tree:

• Ascension Level 2 - A Hundred Temperings of BonesYou can accumulate up to 80 units of energy beyond the limit. After the ultimate is activated, the excess is reset and the same amount is replenished. Upon entering battle or dispelling the zone, if the bar is less than 75% full, it is instantly restored to 75%. When the ultimate is charged, all negative effects are removed from the swordsman.
• Ascension Level 4 - A Thousand Forges of the SoulWhile the zone is active, the chance of being attacked increases, damage taken is reduced by 50%, and incoming healing is increased by 50%. Taking a hit inflicts the "Fiery Bonds" status on the enemy, granting the hero 1 charge.
• Ascension Level 6 - Tempered HeartWhile the zone is active, damage dealt by allies is increased by 50%. If other followers of the Void are in the group, each character's ultimate is increased by 75%. If the requirement is not met, the unit's own damage is increased by 75%.

After unlocking all branches, the bonus to characteristics will be:

Eidolons

The best Fire Blade Eidolons are E1 и E2:

• 1 — Reduces enemy resistance to all elements and delays the Super Ability timer. This gives the hero another versatile source of debuffs and the ability to remain in Power Form for longer.
• 2 — Counts ultimates as bonus attacks and enhances this type of attack, simultaneously increasing the talent's charge limit. Constancy is useful not only for characters with similar mechanics but also for any team due to the damage boost.

If you're planning to invest in the Stellaron Hunter, E2 will be the optimal "stopping point": it provides a significant efficiency boost without excessive costs. The other levels are also useful (especially E6), but don't justify the required amount of currency.

How to play as Mortenax Blade

Regardless of the role, Blade's (Netherness) rotation revolves around constantly using his ultimate to enter the buffed state of Immense Fury and create a zone within which to spread out debuffs.

Given the importance of the ultimate, a steady supply of energy is key to a successful fight. It can be gained in the following ways:

• The talent grants special charges from allied attacks - upon reaching 9 stacks, 25 units are restored (level 10) and a skill is automatically applied, considered a bonus hit.
• Active skills are skill and basic attack.
• Receiving incoming damage from enemies.
• Third party sources (character, cone and/or equipment buffs).

The high cost of the superpower is partly offset by the trace mechanics A Hundred Temperings of Bones: excess energy accumulates and is transferred, and at the beginning of the battle or when the zone dissipates, the scale is restored to 120 units if less than 75% was filled.

The most important thing is to manage the ultimate wisely, taking into account the team composition, the behavior of the enemies and the mode being played (for example, in the “Hall of Oblivion” the zone timer is reset when changing waves). Recommended sequence of actions:

1. Before combat, use a technique to apply Taunt to enemies. Since this is an offensive ability, activate your support abilities first.
2. The "Hundred Tempered Bones" effect will fill the gauge to 75% (120 units). However, the skill will be blocked, so stick to the strategy of getting hit by enemy attacks (the technique will help with this) and performing counterattacks.
3. Use your first ultimate when ready or you can hold on, so that another damage dealer can activate their primary skill while buffed. Note that stacking is only possible up to 80 units above the limit (total: 240 units).
4. When activating the ultimate, the hero consumes health, creates a zone, and transforms into a special form. A countdown appears on the action panel at a fixed speed of 70 units. The talent will also begin to function, accordingly. try to attack with your allies more often, to accumulate charges.
5. In the future, prioritize area-of-effect damage. However, when HP is too low or there's no way to heal, it's best to use a basic attack—the area-of-effect damage will disappear if HP drops to 0 (the skill is blocked at 1 HP).
6. Upon receiving an enhanced superpower take into account the situation on the battlefield и order of moves: how soon the timer will end, how many enemies are currently in the arena, when the next action of the hero/allies will be, and so on.

For example, if there are 1-2 turns left before the end of the countdown, and the situation is such that the swordsman will not be able to quickly return to the state, it makes sense to save the ultimate.

Is the character worth getting?

Mortenax Blade is considered a versatile hero, filling a variety of roles (from support to main damage dealer) and fitting well into any group. His debuffs increase his pure damage output, making him useful regardless of the squad type or teammate specialization. His ability to absorb enemy attacks allows him to play as a tank instead of a shielder/healer.

Works best when paired with damage dealers. Path of Nihility (Tempered Heart trace) and benefits from units using bonus attacks (In the zone, allied strikes accumulate charges, although the b/a boost only unlocks at E2). The Stellaron Hunter's mechanics harmonize perfectly with Emanator Acheron и Detective AshvaleAccordingly, with the presence of these heroes, he will be especially in demand.

The basis of the gameplay — is a superpower: it transforms the character into an enhanced form and inflicts key negative status effects, such as decreased defense and increased damage taken. The first hidden passive, "Hundred Tempered Bones," helps with energy, allowing for the potential for multiple uses of the ultimate. However, to achieve maximum effectiveness, careful consideration of combat and squad composition remains essential.

Which is better: E1 or signature?

Although the signal offers VE and a health boost, the first const is often a priorityThe reduction in resistance to all elements and the increased duration of the zone are a powerful improvement for the entire party. Additionally, this brings the Eidolon closer to E2, which is considered one of the best Eidolons.

There are plenty of suitable alternatives among Light Cones (especially for sub-damage dealers/supports), so a signature weapon isn't strictly necessary. However, if you want to simplify your build as much as possible, getting a "card" might be more practical, especially since its drop rate is higher—75/25.