Reborn again in an entirely new form, Mortenax Blade will be making his debut as a Fire Nihility character in Honkai Star Rail Version 4.3 Update patch. In this article, we will go over all of the leaked details regarding Mortenax Blade’s skill kit, lightcone and more!
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Honkai Star Rail Mortenax Blade Details & Skill Kit Leaks
Thanks to trusted leaked sources, we have now got an overall look into who Mortenax Blade will be as a character and what his skill kit and abilities will be for now.
Please keep in mind that since this is leaked information, despite being from a trusted source, this information is subject to change and can be greatly altered when the official release of the character is out, so take this information with a grain of salt.
General Information
Mortenax Blade is an upcoming 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.

Mortenax Blade Skill Kit
– Basic Attack: 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.
– Enhanced Basic Attack: Deals Fire DMG equal to 100% of Mortenax Blade’s Max HP to one designated enemy, and causes the target to enter the Taunt state for 1 turn.
– Skill: Consumes HP equal to 15% of Mortenax Blade’s Max HP and deals Fire DMG equal to 72% of Mortenax Blade’s Max HP to all enemies, and additionally deals 4 instance(s) of DMG, with each instance dealing Fire DMG equal to 24% of Mortenax Blade’s Max HP to one random enemy.
If the current HP is insufficient, Mortenax Blade’s current HP will be reduced to 1 when using his Skill.
Using Skill does not consume Skill Points.
– Ultimate: Inflicts “Balefire Bind” on all enemies. Enemy targets in the “Balefire Bind” state have their DEF reduced by 30% and DMG received increased by 50%, lasting for 2 turn(s). Then, consumes HP equal to 30% 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%, 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 recover 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.
Mortenax Blade cannot use his Skill when not in the “Infinite Fury” state.
– Enhanced Ultimate: Deals Fire DMG equal to 300% of Mortenax Blade’s Max HP to all enemies.
– Talent: 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, Mortenax Blade consumes 9 Charge points, regenerates 25 Energy, and uses his Skill 1 extra time. This extra Skill usage does not consume HP and is considered as a Follow-Up ATK.
– Technique: Immediately attacks all enemies within range. After entering combat, Taunts the target for 1 turn and decreases DMG taken by this unit by 90% for 2 turn(s).
– Bonus Ability 1: 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 50%, it is immediately regenerated to 50%.
– Bonus Ability 2: While the Zone is active, increases the chance of being attacked by enemies. After being attacked, inflicts the “Balefire Bind” state on the attacker and Mortenax Blade gains 1 Charge.
– Bonus Ability 3: 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 50%. Otherwise, Follow-Up ATK DMG dealt by ally targets increases by 50%.
Mortenax Blade Eidolons
– E1: While the Zone is active, decreases all enemies’ All-Type RES by 20%. After using the extra Skill from Talent, the “Infinite Fury” countdown has its action delayed by 15%.

– E2: Increases DMG dealt by the extra Skill from Talent by 50%. When an ally character uses their Ultimate to deal DMG, it is considered as launching a Follow-Up ATK. While the Zone is active, when other allies use a Follow-Up ATK, Mortenax Blade gains 1 Charge. This effect can be triggered up to 9 time(s), and the trigger count resets at the start of Mortenax Blade’s turn or when the Zone is deployed.

– E4: “Heart, Refined ad Infinitum” additionally increases ally targets’ DMG dealt by 50%.

– E6: While the Zone is active, when Mortenax Blade takes DMG or consumes HP, he gains 1 Charge. This effect can be triggered again after any target’s turn ends. The DMG multiplier of “Tenax Per Ignem” increases to 150% of the original multiplier.

Mortenax Blade Lightcone
Reforged in Hellfire

Effect: Increases the wearer’s Max HP by 24%. At the start of each wave, the wearer regenerates 20 Energy. 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%.
Overall Gameplay Assessment
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.
Initial Impression And Pull Advice
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.
Conclusion
The reborn version of a beloved character, don’t miss out on getting Mortenax Blade upcoming Honkai Star Rail Version 4.3 update by taking advantage of Enjoygm’s special discounted deals for Honkai Star Rail Top Up right away!



