Mortenax Blade build
Mortenax Blade
Mortenax Blade turns enemy and ally actions into a nearly continuous field of DEF reduction, vulnerability and HP-scaled Follow-Up damage.
Fire
Nihility- Role
- Fire HP-scaling Nihility debuffer and Follow-Up sub-DPS
- Version
- 4.4
- Reviewed on
- August 12, 2026
Recommended build
Light Cone
Reforged in HellfireReforged in Hellfire raises Max HP, accelerates the first Zone and amplifies CRIT DMG taken.
When to use it : Use Skill during Infinite Fury to apply Purgatory for two turns; its fixed 20 Energy occurs once per wave.
Lies Dance on the BreezeLies Dance on the Breeze converts the debuffed-target plan into direct damage without replacing the Zone's utility.
When to use it : Keep the enemy debuffed before Blade attacks.
Before the Tutorial Mission StartsBefore the Tutorial Mission Starts provides Effect Hit Rate and an Energy refund for the DEF-reduction loop.
A permanent Herta's Store four-star exchange, without Battle Pass or signature Warp.
When to use it : Attack a target whose DEF Blade has reduced to recover Energy.
Resolution Shines As Pearls of SweatResolution Shines As Pearls of Sweat adds another short DEF-reduction source for a debuff-focused build.
When to use it : Apply its DEF reduction before the team's damage window.
Holiday Thermae EscapadeHoliday Thermae Escapade is source-listed but its Battle Pass route makes it a conditional premium alternative.
When to use it : Use only if the Battle Pass cone is already owned.
Relics
Divine-Querying Master Smith adds HP, CRIT DMG against DEF-reduced targets and a refreshable team DMG bonus.
When to use it : Keep Balefire Bind active so the DEF-reduction clause is live.
Eagle of Twilight Line's Wind DMG is entirely wasted on Fire Mortenax Blade; its only retained value is the four-piece Ultimate action advance.
When to use it : Use it only to advance Blade 25% after his Ultimate for a faster Zone rotation.
Longevous Disciple gives a durable HP baseline when prioritizing Blade's own survivability.
Planar Ornaments
Sprightly Vonwacq advances Blade's opening action so the Zone is established before the carry acts.
Bone Collection's Serene Demesne increases both HP and CRIT DMG for personal damage.
When to use it : Reach 5,000 Max HP before combat effects.
Lushaka trades personal damage for Energy regeneration and a targeted ally ATK buff.
When to use it : Place the main damage dealer first in the team order.
Team lineup
Acheron converts Mortenax Blade and Jiaoqiu's dense debuff stream into Slashed Dream, while Aventurine sustains the group and adds attacks without competing for Skill Points.
When to use it : Place Mortenax Blade's Zone before Acheron's Ultimate, maintain Jiaoqiu's Ashen Roast and let Aventurine's frequent Follow-Up attacks accelerate the 9-Charge loop.
Compare the options — Mortenax Blade
Choose based on your equipment and the stated conditions. These tables bring together the guide’s qualitative recommendations, without measured damage comparisons.
- Guide version
- 4.4
- Recommendations reviewed
- Assumed role
- Fire HP-scaling Nihility debuffer and Follow-Up sub-DPS
The guide’s stat targets and rotation provide the context. Eidolons, superimpositions, substats and enemies may change the choice; options are not evaluated at equal investment.
On small screens, scroll the table horizontally to compare columns.
| Option | Why choose it? | Conditions and availability |
|---|---|---|
| Guide’s reference choice | Reforged in Hellfire raises Max HP, accelerates the first Zone and amplifies CRIT DMG taken. | Use Skill during Infinite Fury to apply Purgatory for two turns; its fixed 20 Energy occurs once per wave. |
| Alternative | Lies Dance on the Breeze converts the debuffed-target plan into direct damage without replacing the Zone's utility. | Keep the enemy debuffed before Blade attacks. |
| Accessible option | Before the Tutorial Mission Starts provides Effect Hit Rate and an Energy refund for the DEF-reduction loop. | Attack a target whose DEF Blade has reduced to recover Energy. A permanent Herta's Store four-star exchange, without Battle Pass or signature Warp. |
| Alternative | Resolution Shines As Pearls of Sweat adds another short DEF-reduction source for a debuff-focused build. | Apply its DEF reduction before the team's damage window. A permanent four-star Warp cone, available without Battle Pass. |
| Alternative | Holiday Thermae Escapade is source-listed but its Battle Pass route makes it a conditional premium alternative. | Use only if the Battle Pass cone is already owned. A Nameless Honor Battle Pass option; it is not the accessible baseline. |
| Option | Why choose it? | Conditions and availability |
|---|---|---|
| Guide’s reference choice | Divine-Querying Master Smith adds HP, CRIT DMG against DEF-reduced targets and a refreshable team DMG bonus. | Keep Balefire Bind active so the DEF-reduction clause is live. |
| Alternative | Eagle of Twilight Line's Wind DMG is entirely wasted on Fire Mortenax Blade; its only retained value is the four-piece Ultimate action advance. | Use it only to advance Blade 25% after his Ultimate for a faster Zone rotation. |
| Alternative | Longevous Disciple gives a durable HP baseline when prioritizing Blade's own survivability. | No additional condition documented in this guide. |
| Option | Why choose it? | Conditions and availability |
|---|---|---|
| Guide’s reference choice | Sprightly Vonwacq advances Blade's opening action so the Zone is established before the carry acts. | No additional condition documented in this guide. |
| Alternative | Bone Collection's Serene Demesne increases both HP and CRIT DMG for personal damage. | Reach 5,000 Max HP before combat effects. |
| Alternative | Lushaka trades personal damage for Energy regeneration and a targeted ally ATK buff. | Place the main damage dealer first in the team order. |
Only one option documented: no A/B comparison available.
| Option | Why choose it? | Conditions and availability |
|---|---|---|
| Guide’s reference choice | Acheron converts Mortenax Blade and Jiaoqiu's dense debuff stream into Slashed Dream, while Aventurine sustains the group and adds attacks without competing for Skill Points. | Place Mortenax Blade's Zone before Acheron's Ultimate, maintain Jiaoqiu's Ashen Roast and let Aventurine's frequent Follow-Up attacks accelerate the 9-Charge loop. |
Trace priority
- Ultimate
- Skill
- Talent
- Basic ATK
Mortenax Blade spends HP to maintain Infinite Fury, holds a universal damage Zone and repeatedly reapplies Balefire Bind while ally attacks charge a free Follow-Up Skill.
How to play it
- 1Open with Technique or a taunting Basic, let Bone, Hardened ad Nauseam raise Energy to 75% if needed, then cast Fornax Ex Corpore before the team's main damage window.
- 2During Infinite Fury, every allied attack grants one Charge; at 9 Charge, the Talent spends the stack, restores 30 Energy and launches one Skill as a Follow-Up ATK without consuming a Skill Point.
- 3Keep Balefire Bind's 35% DEF reduction and 60% DMG taken increase active. Preserve enough Energy to recast the base Ultimate when the fixed-70-SPD countdown removes the Zone instead of spending Tenax Per Ignem at the cost of uptime.
Sources and methodology
Editorial recommendations are written from released game data, then cross-checked against specialist calculations. They are not copied from a single tier list.
Review method
Prydwen and Icy Veins were read independently after Mortenax Blade's Version 4.3 release, then checked against the exact local 4.4 snapshot. The maxed E0 Trace-level-15 model treats every allied attack as one Charge event, spends exactly 9 Charge for the 30-Energy Follow-Up Skill, and keeps the fixed-70-SPD Zone countdown distinct from Mortenax Blade's sheet SPD. It applies the released 35% DEF reduction and 60% vulnerability for two turns, caps his own CRIT at 100% after the Ultimate's 20%, and keeps the maxed 75% CRIT DMG bonus outside sheet targets. Effect Hit Rate is not assigned unless a selected cone needs it. Official 4.3 notes and the immutable 4.0-to-4.4 delta establish the release baseline and subsequent catalog state.
- Game data snapshot
- 4.4
- Snapshot commit
- 648b08fb
- Baseline version
- 4.3
- Published on
- Editorial review by
- HoyoWhatpeon
- Prydwen — direct released mortenax-blade build analysisChecked 2026-08-12
- Icy Veins — independent released mortenax-blade build analysisChecked 2026-08-12
- TurnBasedGameData — Version 4.4 exact snapshotChecked 2026-08-12
- TurnBasedGameData — released Version 4.0 to 4.4 deltaChecked 2026-08-12
- HoYoLAB — Version 4.3 update detailsChecked 2026-08-12
Independent E0 recommendations. The 80% sheet CRIT Rate ceiling assumes the Ultimate's own 20% and stops at 100% effective; Effect Hit Rate is listed only when the equipped cone requires it.
Related builds
- The DahliaNihility · Fire Super Break enabler and Dance Partner amplifierSame Path
- FugueNihility · Exo-Toughness and Super Break supportSame Path
- JiaoqiuNihility · debuff amplifierSame Path
- GuinaifenNihility · Fire Burn and vulnerability supportSame Path
- HysilensNihility · Physical DoT applier and zone debufferSame Path