Mortenax Blade 
Nihility His body is like springwood. His heart is like dead ash. Yet still, a craftsman's spark cling to his fingertips. Ancient grudges flare anew. He vows to send both himself and that God over to the other shore. This body torn asunder, yet holding fast through a thousand temperings into a blade... What answer will it forge?
HP
ATK
DEF
SPEEDDebuffer Build
Best Light Cone
Mortenax Blade Best Stats
Mortenax Blade Best Substats
Mortenax Blade Best Ornaments
Sprightly Vonwacq
Bone Collection's Serene Demesne
Lushaka, the Sunken Seas
Mortenax Blade Best Teams
Hypercarry Acheron
Mortenax Blade is a general debuffer. Pair him with hypercarry Acheron, another support like Welt, and a sustain character like Permansor Terrae.
Hypercarry Archer
Mortenax Blade is a general debuffer. Pair him with hypercarry Archer, another support like Sparkle, and a sustain character like Permansor Terrae.
Hypercarry Ashveil
Mortenax Blade is a general debuffer. Pair him with hypercarry Ashveil, another support like Feixiao, and a sustain character like Permansor Terrae.
Hypercarry The Herta
Mortenax Blade is a general debuffer. Pair him with hypercarry The Herta, any Erudition DPS/Sub-DPS, and a sustain character like Permansor Terrae.
Beginner F2P
For beginners, Mortenax Blade can be used as a debuffer or DPS. March 7th (Imaginary) increases his SPD, Asta boosts SPD and ATK, and Lynx provides sustain.
Nihility Acheron
Mortenax Blade in a Nihility team with Acheron as main DPS. Can run sustainless or with a sustain; Welt helps delay enemies.
Follow-Up ATK Ashveil
Mortenax Blade in a Follow-Up ATK team with Ashveil. His Talent's additional skill counts as Follow-Up ATK. Use sustain characters that attack frequently to trigger Ashveil's Follow-Up ATKs and charge Tribbie's Ultimate.
Skills
Deals Fire DMG equal to #1[i]% of Mortenax Blade's Max HP to one designated enemy, and causes the target to enter the Taunt state for 1 turn.
Consumes HP equal to #4[i]% of Mortenax Blade's Max HP and deals Fire DMG equal to #1[f1]% of Mortenax Blade's Max HP to all enemies, and additionally deals #2[i] instance(s) of DMG, with each instance dealing Fire DMG equal to #3[f1]% 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 he uses Skill. While not in the "Infinite Fury" state or when the current HP is 1 or lower, Mortenax Blade cannot use his Skill. Using Skill does not consume Skill Points.
Inflicts "Balefire Bind" on all enemies. Enemy targets in the "Balefire Bind" state have their DEF reduced by #7[f1]% and the DMG they receive increases by #4[f1]%, lasting for #8[i] turn(s). Then, consumes HP equal to #1[i]% of Mortenax Blade's Max HP to deploy a Zone. While the Zone is active, Mortenax Blade enters the "Infinite Fury" state. During the "Infinite Fury" state, increases CRIT Rate by #2[i]%, increases CRIT DMG by #3[f1]%, enhances Basic ATK, unlocks 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 #6[i]% of this unit's Max HP. When gaining the "Infinite Fury" state, a corresponding countdown appears on the Action Order. The countdown has a fixed SPD of #5[i]. 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 he uses this ability.
An ally will be incapacitated once their HP is reduced to 0.
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 #1[i] points and the current HP is more than 1, consumes #1[i] Charge, regenerates #2[f1] Energy, and enables Mortenax Blade to use Skill 1 extra time. This extra Skill use is considered as Follow-Up ATK.
Unleashes an extra attack on the target. This effect is triggered automatically when requirements are met.
Traces
Eidolon
While the Zone is active, decreases all enemies' All-Type RES by
Increases the target's waiting interval before the next action.
When an ally character uses Ultimate to deal DMG, it is considered as having launched Follow-Up ATK. And the Follow-Up ATK DMG dealt by ally targets increases by
Unleashes an extra attack on the target. This effect is triggered automatically when requirements are met.
Ultimate Lv. +2, up to a maximum of Lv.
"Heart, Refined ad Infinitum" additionally increases ally targets' DMG dealt by
Skill Lv. +2, up to a maximum of Lv.
As the Zone persists, when Mortenax Blade takes DMG or consumes HP, he gains 1 Charge. This effect can trigger again after any target's turn ends. The DMG multiplier of "Tenax Per Ignem" increases to