Honkai Star Rail Mortenax Blade Best Build Guide – Lightcones, Relics and More

Mortenax Blade Skill Kit & Playstyle Analysis

General Introduction

Mortenax Blade is a 5-star character of the Fire Element and follows the path of Nihility. He offers the team immense debuff effects that massively boost the damage the entire deal to the enemies while also helping boost the team’s ultimate and follow up attack damage through various conditions. Additionally, he can function as a practically immortal taunt sustain for various teams.

Skill Analysis & Leveling Priority

	Deals Fire DMG equal to 50% of Mortenax Blade’s Max HP to one designated enemy, and causes the target to enter the Taunt state for 1 turn.
	Leveling Priority: Low
Basic Attack
Reason: Only level this up if you have extra resources and want to optimize Mortenax Blade’s damage.

	Consumes HP equal to 10% of Mortenax Blade’s Max HP and deals Fire DMG equal to 72.0% of Mortenax Blade’s Max HP to all enemies. If the current HP is insufficient, current HP will be reduced to 1. Additionally deals 4 instance(s) of DMG, with each instance dealing Fire DMG equal to 24.0% of Mortenax Blade’s Max HP to one random enemy. When not in the “Infinite Fury” state or when current HP is 1 or lower, Mortenax Blade cannot use his Skill.Using Skill does not consume Skill Points.
	Leveling Priority: High
Skill
Reason: One of Mortenax Blade’s Damage Source, allowing him to deal damage to enemies when he is in his Ultimate state.

	Normal Ultimate Inflicts “Balefire Bind” on all enemies. Enemy targets in the “Balefire Bind” state have their DEF reduced by 30.0% and DMG received increased by 50.0%, lasting for 2 turn(s). Then, consumes HP equal to 20% of Mortenax Blade’s Max HP to deploy a Zone. While the Zone is active, Mortenax Blade enters the “Infinite Fury” state.While in the “Infinite Fury” state, CRIT Rate increases by 20% and CRIT DMG increases by 60.0%, unlocks his Skill, and gains a new Ultimate “Tenax Per Ignem.” When receiving a killing blow, this unit will not be knocked down, but will dispel the Zone, exit the “Infinite Fury” state, and restore HP equal to 50% of this unit’s Max HP. When entering the “Infinite Fury” state, a corresponding countdown appears on the Action Order. The countdown has a fixed SPD of 70. At the start of the countdown’s turn, dispels the Zone and exits the “Infinite Fury” state.If the current HP is insufficient, Mortenax Blade’s current HP will be reduced to 1 when using this ability. Enhanced Ultimate Deals Fire DMG equal to 350.0% of Mortenax Blade’s Max HP to all enemies.
	Leveling Priority: Highest
Ultimate
Reason: Mortenax Blade’s main damage source and gimmick, should be leveled up as much as possible to optimize his damage output and stats.

	While the Zone is active, after each attack an ally target uses on an enemy, inflicts the “Balefire Bind” state on the corresponding enemy target and grants 1 Charge to Mortenax Blade. When Charge reaches 9 points and Mortenax Blade’s current HP is more than 1, Mortenax Blade consumes 9 Charge points, regenerates 25.0 Energy, and uses his Skill 1 extra time. This extra Skill usage is considered as a Follow-Up ATK.
	Leveling Priority: High
Talent
Reason: Mortenax Blade’s main gimmick that should be leveled up to boost his overall damage output and allows him to recover more energy quickly

	Mortenax Blade can accumulate up to 80 Energy overflow. After using Ultimate, the Energy overflow is cleared and a corresponding amount of Energy is regenerated. When the battle starts or when the Zone is dispelled, if Energy is below 75%, it is immediately regenerated to 75%.
	Unlock Priority: Highest
Bonus Ability 1
Reason: An amazing Additional Ability that allows Mortenax Blade to becomes functionally immortal due to his ability to constantly generate Energy and enter Ultimate state after he is out of the zone.

	While the Zone is active, increases the chance of being attacked by enemies, decreases DMG taken by this unit by 50%, and increases Incoming Healing by 50%. After being attacked, inflicts the “Balefire Bind” state on the attacker, and Mortenax Blade gains 1 Charge.
	Unlock Priority: High
Bonus Ability 2
Reason: An additional ability that massively boost Mortenax Blade’s overall survivability by improving his healing and reducing the damage he takes.

	While the Zone is active, DMG dealt by ally targets increases by 50%. If there are other Nihility characters aside from Mortenax Blade in the ally team, Ultimate DMG dealt by ally targets increases by 75%. Otherwise, DMG dealt by Mortenax Blade additionally increases by 75%.
	Unlock Priority: Highest
Bonus Ability 3
Reason: An incredible additional ability to make Mortenax Blade into either a Ultimate Support character whenever he is in the same team as another Nihility Character or massively boost Mortenax Blade’s own damage output.

Playstyle Guide & Rotation

Mortenax Blade’s skill kit makes him a very strong debuffer support character capable of both reducing the enemies’ defenses and making them take more damage while also being able to supplement the team’s overall damage output and sustain the team with his effects that make him functionally immortal.

Mortenax Blade main utility and effects lies in his Ultimate and 3rd Bonus Ability, which allows him to set up a powerful zone that massively reduces enemies’ defenses while also boosting the damage they take from all allies. Additionally, when going alongside a team with an additional Nihility character, Mortenax Blade can buff the Ultimate Damage of all allies by a massive 50%. If the team doesn’t have an additional Nihility character instead, Mortenax Blade will increase the entire team’s Follow Up Attack damage, making him suitable to be a very strong support and debuffer for both the Debuff Nihility team and any Follow Up Attack teams.

Additionally, Mortenax Blade has the ability to be functionally immortal due to his special ability to activate and deactivate his zone. By activating his zone, Blade can enter an enhanced state that massively deals damage to enemies and makes all enemies attack him more frequently, allowing him to gain charge and energy. If he gets a killing blow from enemies, he will automatically exit the zone, recover 50% of his Max HP and his energy, then convert all of his excess energy into actual Ultimate energy, allowing him to immediately enter his zone again. As long as Mortenax Blade has enough energy to constantly activate his Zone, he is functionally immortal and can help to apply taunt to enemies, making them attack him more and protect the team.

Mortenax Blade serves as a premium debuffer and damage support for all types of teams with an amazing skill kit that massively increases the damage taken by enemies. He especially excels at helping to boost the damage output of the Acheron Nihility team through his ability to buff Ultimate Damage and can also be an extremely powerful support for any Follow Up Attack teams.

Mortenax Blade Best In Slot And F2P Lightcones

Mortenax Blade Best Lightcone Choices

Reforged in Hellfire	Before the Tutorial Mission Starts	Along the Passing Shore
Limited 5* Lightcone	4* Lightcone	Limited 5* Lightcone

	Attack: 423
	Defense: 463
	HP: 1375
Reforged in Hellfire	Lightcone Rating: Best In Slot
Effect: Increases the wearer’s Max HP by 30%. At the start of the wearer’s turn, they regenerate a fixed amount of 20 Energy. This effect can trigger 1 time each wave. After the wearer uses a Skill Attack, inflicts the target with the “Purgatory” state, lasting for 2 turn(s). While in the “Purgatory” state, CRIT DMG taken by the target increases by 30%, and CRIT DMG taken from the wearer additionally increases by 30%.
Explanation: Mortenax Blade’s signature Lightcone that grants him everything he needs: max HP boost, energy regen and allows him and the team to deal increased critical damage taken to all enemies.

	Attack: 476
	Defense: 330
	HP:  952
Before the Tutorial Mission Starts	Lightcone Rating: Best Alternative
Effect: Increases the wearer’s Effect Hit Rate by 20%. When the wearer attacks DEF-reduced enemies, regenerates 4 Energy.
Explanation: The best alternative Lightcone for Mortenax Blade despite being a 4-Star Lightcone due to its decently high HP stat and the ability to constantly allow Blade to generate Energy, helping him to always have his Ultimate up when attacking enemies enough times.

	Attack: 635
	Defense: 396
	HP:  1058
Along the Passing Shore	Lightcone Rating: Good Alternative
Effect: Increases the wearer’s CRIT DMG by 36%. When the wearer hits an enemy target, inflicts Mirage Fizzle on the enemy, lasting for 1 turn. Each time the wearer attacks, this effect can only trigger 1 time on each target. The wearer deals 24% increased DMG to targets afflicted with Mirage Fizzle, and the DMG dealt by Ultimate additionally increases by 24%.
Explanation: A good alternative Lightcone for Mortenax Blade if players want to focus more on his own personal damage output rather than his team support effects.

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Mortenax Blade Best Relics, Ornament Set and Stats

Mortenax Blade Best Relics And Ornament Sets

For Mortenax Blade, his best Relic set is the brand new Divine-Querying Master Smith set, which provides him with a massive boost in HP and helps him to reduce enemies’ defenses while boosting the team’s damage output. 

	Divine-Querying Master Smith
2-pc: Increases Max HP by 12%.
4-pc: Increases the wearer’s CRIT DMG dealt to enemy targets in the DEF reduction state by 28%. After the wearer inflicts the DEF reduction state on an enemy target, all allies gain “Comburent” for 2 turn(s). This effect cannot be stacked. DMG dealt by ally targets with “Comburent” increases by 15%. This effect can be triggered again after the wearer uses an attack.
Explanation: Thí set helps Mortenax blade optimize his stat needs while also reducing enemies’ defenses and help to boost his own damage against enemies with debuffs.

For Ornaments, Mortenax Blade should use the City of Converging Stars Ornament set:

	City of Converging Stars
2-pc: When the wearer uses Follow-Up ATK, increases ATK by 24% for 2 turn(s). When an enemy target gets defeated, increases CRIT DMG for all allies by 12% in the current battle. This effect cannot stack.
Explanation: This Ornament set massively boosts Mortenax Blade’s attack whenever he uses a follow up attack and allows him to permanently boost the critical damage of the team whenever an enemy is defeated, maximizing his team support potential.

Mortenax Blade Best Main Stats & Sub Stats

As a DPS character that can fit into the main or sub DPS roles, Mortenax Blade wants as many critical and offensive stats as possible to optimize his personal damage output in addition to his much needed HP stat.

Important Stat Threshold:

– Like with other DPS characters, players should aim for a 1:2 Critical Ratio for Mortenax Blade and aim to boost his critical stats as high as possible.

– Prioritize Boosting Mortenax Blade’s HP as high as possible to allow him to deal more damage since his damage is HP-based.

– Mortenax Blade is a character that wants to spam his Ultimate as frequently as possible, so players should use an Energy Regen% Rope on him. If players want to instead maximize his damage output, then using a HP% Rope is okay as well.

Mortenax Blade Best Teams 

As a Main or Sub DPS character capable of supporting and dealing amazing Ultimate Damage by himself and with others, due to the nature of Mortenax Blade’s Talent changing depending on if there’s another Nihility character in the team, Mortenax Blade’s teams can essentially be divided into 2 types of teams:

Acheron Ultimate Team

Acheron	Mortenax Blade	Jiaoqiu	Sparkle
Main DPS	Sub DPS/Support	Support	Support

This team takes advantage of Mortenax Blade’s talent effect to boost the team’s Ultimate damage output whenever there’s another Nihility character aside from Mortenax Blade in the team to help boost Acheron’s Ultimate damage output to the maximum.

Mortenax Blade is used in the team mainly as a sub DPS and support character, capable of massively reducing enemies defenses and making them take more damage overall while also providing debuffs to Acheron. Jiaoqiu is used as a secondary debuffer to quickly raise Acheron’s Ultimate gauge while also debuffing enemies and making them take more damage. For sustain, since Mortenax Blade has the ability to taunt enemies and is functionally immortal as long as he can activate his Ultimate, players can run a full sustainless team comp with good timing on his abilities.

Mortenax Blade Ashveil Duo Team

Mortenax Blade	Ashveil	Sunday	Dan Heng Permansor Terrae
Main DPS	Sub DPS/Support	Support	Support/Sustain

For this team, Mortenax Blade is the main focus with his ability to deal constant Follow Up Attacks to clear out enemies with his amazing damage output, making him suitable to become a sub or Main DPS character for the team. Since there’s no other Nihility characters in this team, Blade will receive a massive 150% boost to his Ultimate damage thanks to his Talent, making him extremely strong in nature. Coupled this fact with Ashveil’s ability to constantly Follow Up Attack to help stack Mortenax Blade’s Follow Up Attack Charges and also reduces the enemies’ defenses massively and you get yourself a duo of characters that can enable many different hypercarry and multiple DPS team comps.

Conclusion

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