Black Swan vs Mortenax Blade
Black Swan vs Mortenax Blade — two Nihility characters competing for the same roster slot.
TL;DR — Quick Pick
Pick Black Swan if…
- You need a Wind Nihility unit and Black Swan's kit matches your account gap.
- You prefer DoT DPS gameplay over Mortenax Blade's Debuffer identity.
- Yes for DoT—Black Swan is the Arcana carry/support hybrid.
Pick Mortenax Blade if…
- You need a Fire Nihility unit and Mortenax Blade's kit matches your account gap.
- You prefer Debuffer gameplay over Black Swan's DoT DPS identity.
- Situational—Mortenax Blade is a Fire Nihility debuffer; pull for DoT/Break flex.
Black Swan and Mortenax Blade are both Nihility investments that answer different account needs. Black Swan (Wind, DoT DPS) shines when Yes for DoT—Black Swan is the Arcana carry/support hybrid.. Mortenax Blade (Fire, Debuffer) is the better commit when Situational—Mortenax Blade is a Fire Nihility debuffer; pull for DoT/Break flex.. Compare signature builds, team requirements, and your existing supports before pulling either.
At a Glance
Strengths & Weaknesses
Black Swan
- Ultimate “Bliss of Otherworld's Embrace” hits the full field and forces DoT application/detonation in one cast—Pure Fiction waves melt once the status is seeded.
- “Decadence, False Twilight” Blast-hits the main target plus adjacent enemies, so adjacent elites still take meaningful chip without waiting for Ultimate.
- Talent “Loom of Fate's Caprice” Blast-hits the main target plus adjacent enemies—miss the stack conditions and the burst window feels empty.
- Several Black Swan effects roll “base chance”—without enough Effect Hit Rate, Exposed/Shock/DEF shred simply misses on tanky bosses and the rotation feels empty.
- E0 without “Reforged Remembrance” is still clearable, but the gap versus a signature copy is larger than a single eidolon for most Nihility carries—plan the cone before deep eidolon hunting.
- DoT damage needs other appliers or long-lived statuses on the field—Black Swan alone cannot keep every wave fully stacked without a second DoT partner.
Mortenax Blade
- Ultimate “Fornax Ex Corpore” spends HP as a deliberate self-damage cost—level this before polishing filler traces.
- Skill “A Rain of Blades Seals Fate” spends HP as a deliberate self-damage cost—the rotation wants controlled self-damage, not panic healing that cancels the state.
- Talent “All Karma Comes Due” fires Follow-Up ATKs off ally Basics—damage keeps flowing even when Mortenax Blade is not the active turn.
- Follow-Ups from “All Karma Comes Due” need allies who actually Basic ATK on schedule—freeze/CC on the team stalls Mortenax Blade’s off-turn damage.
- HP-spend skills mean Mortenax Blade can soft-lock if sustain is weak or if a healer tops them up at the wrong time and breaks a low-HP / Charge condition.
- Spamming “A Rain of Blades Seals Fate” every turn without watching Skill Points strands the rest of the team—Mortenax Blade is often the SP sink.
Shared Team Members
With Black Swan
Tingyun is the Advance / DMG amp — time their Skill/Ult for the carry’s damage window.
With Mortenax Blade
Tingyun is the Advance / DMG amp — time their Skill/Ult for the carry’s damage window.
With Black Swan
Gallagher covers healing (and often Energy / cleanse) so the carry can stay on-curve.
With Mortenax Blade
Gallagher covers healing (and often Energy / cleanse) so the carry can stay on-curve.
Best Builds (Signature)
Light Cone
Reforged Remembrance
Relics
Pioneer Diver of Dead Waters (4pc) + Pan-Cosmic Commercial Enterprise (2pc)
Body
Effect Hit Rate
Feet
SPD
Sphere
Wind DMG%
Rope
ATK%
Substats
EHR (to threshold) > SPD > ATK% / CRIT
Light Cone
Reforged in Hellfire
Relics
Pioneer Diver of Dead Waters (4pc) + Pan-Cosmic Commercial Enterprise (2pc)
Body
Effect Hit Rate
Feet
SPD
Sphere
Fire DMG%
Rope
ATK%
Substats
EHR (to threshold) > SPD > ATK% / CRIT
Who Should You Pull?
- You need a Wind Nihility unit and Black Swan's kit matches your account gap.
- You prefer DoT DPS gameplay over Mortenax Blade's Debuffer identity.
- Yes for DoT—Black Swan is the Arcana carry/support hybrid.
- Ultimate “Bliss of Otherworld's Embrace” hits every enemy on the field in one cast.
- Black Swan is a stronger general pull priority for your roster.
- You need a Fire Nihility unit and Mortenax Blade's kit matches your account gap.
- You prefer Debuffer gameplay over Black Swan's DoT DPS identity.
- Situational—Mortenax Blade is a Fire Nihility debuffer; pull for DoT/Break flex.
- Ultimate “Fornax Ex Corpore” deploys a team Zone with RES PEN / Break-oriented amp.
- Ultimate “Fornax Ex Corpore” spends HP as a deliberate self-damage cost—level this before polishing filler traces.