Phantasio is an Umbro, melee–ranged hybrid who does his best work while transformed. His burst window inside Bestial Fury is explosive; outside of it, his damage drops off, and he’s easier to punish. The core of his gameplay is stacking Adagio, timing the fourth strike or plunge for a big cashout, and converting Max Sanity into sustained Attack through Immersion and Devotion.

Phantasio at a glance (role, element, weapons, key stats)

Field Details
Role DPS / Skill DMG
Element Umbro
Weapons Greatsword (melee) / Shotgun (ranged)
Defining mechanics Adagio stacks (up to 10), Bestial Fury, Immersion, Devotion, Duo, Fermata, Presto
Base stat highlights Umbro ATK 21 → ~395 (Lv.1 → max), HP 130 → 1632, Shield 130 → 1632, Max Sanity 180

Skill kit and values

Phantasio’s kit revolves around entering Bestial Fury, rapidly building Immersion, and flipping into Devotion to keep the form going without draining Sanity. Recitativo sets up Adagio stacks; the fourth hit or a plunge during Bestial Fury cashes them in via Fermata.

Ability Function Key values (Lv.1 → max)
Recitativo (Skill) Umbro damage in front; inflicts 5 Adagio stacks (refreshes duration). In Bestial Fury, becomes Aria (dash) and grants Presto. Sanity cost 20 → 18; DMG 164% → 479%; radius 6m; Adagio duration 8s.
Aria: cost 20 → 18; DMG 249% → 753%; Presto: +30% skill range, 5s, grants hitstun immunity.
Curtain Up (Ultimate) Enter Bestial Fury; drains Sanity over time. Replaces attacks with Furious Claws (4-hit chain + plunge) and Mournful Howl (beam). 3rd hit/beam procs Duo (Immersion gain). 4th hit/plunge triggers Fermata (bonus damage scales with Adagio; at 10 stacks, restores Sanity and grants Immersion). Activation cost 10 → 9; drain 30 → 27 Sanity/s.
Claws DMG: 1st 725% → 2174%, 2nd 725% → 2174%, 3rd 486% → 1449%, 4th 1872% → 5616%; plunge 1935% → 5796% (6m).
Howl DMG 428% → 1274% (20m).
Duo Immersion gain: 0.6% of Max Sanity per proc (0.1s cooldown).
Fermata: DMG scales per Adagio stack; on 10 stacks, +10 Sanity and +6% Max Sanity as Immersion.
On Stage (Passive) In Bestial Fury, Attack scales with Max Sanity. Using Recitativo/Aria and staying in Bestial Fury grants Immersion per second. At max Immersion, enters Devotion: consumes Immersion instead of Sanity to maintain form and increases movement speed, skill speed, and Attack from Max Sanity. Fury ATK boost: up to 25% → 70% of Max Sanity (capped at +315).
Devotion ATK boost: up to 25% → 75% of Max Sanity (capped at +315).
Immersion gain: +20 (Recitativo), +20 (Aria), +30/s in Fury; Devotion drains 30/s. Skill speed +30%.
Passive upgrades Stat bumps and utility +20% ATK; +30% ATK; +5% Skill Efficiency; +7.5% Skill Efficiency.
Concerto: 3rd hit (Claws) and Mournful Howl have a chance to add 1 Adagio stack.
Scale of Justice: when deployed as a Combat Partner, +50% ATK for the character and nearby Umbro teammate(s).

Intron (constellation) effects

Level Effect
I1 Duo’s Immersion gain increases to 1.5% of Max Sanity.
I2 On Claws 3rd hit and Mournful Howl, takes 25% less damage; Concerto’s Adagio application becomes guaranteed.
I3 Recitativo +2 levels; On Stage +1 level.
I4 Claws 4th hit and plunge deal greatly increased damage against targets at 10 Adagio stacks.
I5 Curtain Up +2 levels; On Stage +1 level.
I6 Presto grants an extra +90% Morale; when Duo grants Immersion, Presto’s duration extends by 0.2s.
Note: Minor numeric tuning can shift with updates. The functional interactions above remain the anchor for playstyle.

How to play Phantasio (rotation and uptime)

  • Set up Adagio quickly. One cast of Recitativo applies 5 stacks; two casts cap at 10 and refresh duration.
  • Pop Curtain Up, then weave: Claws 1 → 2 → 3 to trigger Duo and build Immersion. Use Aria to reposition and maintain Presto’s hitstun immunity.
  • Cash out at full stacks. Land Claws 4 or a plunge on a 10‑stack target to trigger Fermata’s large damage and Sanity/Immersion returns.
  • Reach Devotion. Keep Immersion flowing (Duo procs, Recitativo/Aria, Fury passive gain) until the bar caps, then ride Devotion to conserve Sanity.
  • Beam when needed. Mournful Howl is reliable mid‑range pressure and also procs Duo and Concerto.
Tip: His out‑of‑form windows are fragile. Plan a defensive skill or heal around Sanity dips to avoid getting caught between Fury cycles.

Skill leveling priority

  • Curtain Up (Ultimate): Primary damage source and the gateway to all of his key triggers (Duo, Fermata, Devotion uptime).
  • On Stage (Passive): Scales Attack from Max Sanity and speeds up skills; directly improves Fury and Devotion value.
  • Recitativo (Skill): Faster stacking and stronger Aria dashes are helpful, but they sit behind the transformation’s power.

Build priorities (stats, gear, Demon Wedges)

  • Max Sanity scaling: Many effects convert Max Sanity into Attack and uptime; prioritize sources that increase Max Sanity and Immersion sustain.
  • Umbro ATK and Skill Efficiency: Straight damage scaling and better returns on skill usage.
  • Survivability during Fury: Damage reduction and healing uptime help offset his aggressive windows.

For Demon Wedges and gear affixes, look for combinations that boost Umbro damage, Max Sanity, skill speed/efficiency, and damage mitigation. Avoid long wind‑ups that stall the Claws chain; Phantasio thrives on fast, uninterrupted strings.

Best teams for Phantasio

Team core Why it works
Phantasio (main DPS) + Daphne (healer) + Umbro partner Phantasio’s damage spikes in Bestial Fury but he’s exposed between forms; a dedicated healer like Daphne stabilizes Sanity dips and sustained fights. An Umbro partner benefits from the Scale of Justice passive upgrade (+50% ATK aura when Phantasio is a Combat Partner) and keeps element synergy clean.
Phantasio + stagger/CC support + sustain Stagger or crowd control sets up safe Claws 4/plunge cashouts, while sustain keeps him on the floor during the aggressive push. Pick utilities that don’t interrupt his combo cadence.

In ranking discussions, he’s rated as a top‑end DPS when transformed, with a noticeable drop outside of Bestial Fury. At Intron 6, he can extend Fury windows and further amplify damage, but he still benefits from a healer and thoughtful mitigation.

Combos to lock in Fermata

  • Safe burst: Recitativo → Recitativo (10 Adagio) → Curtain Up → Claws 1 → 2 → 3 → 4 (Fermata trigger).
  • Air control: Recitativo → Curtain Up → juggle into plunge on a 10‑stack target for a high‑value Fermata.
  • Beam weave: Build stacks, then mix Mournful Howl between Claws to maintain Duo procs and spacing before the Claws 4 finisher.

How to unlock and what you get with him

All characters and weapons are free to unlock during the global launch. You can start from the official site if you need the entry point to download or sign in: duetnightabyss.dna-panstudio.com.

Common in‑game methods include acquiring character‑specific items (such as Secret Letters purchased with Secret Letter Clues in the Covert Commissions shop). Once he’s in your roster, you can equip the universal Starlit outfit and two Phantasio accessories — Curtainfall (backpiece) and Yesterday No More (face) — unlocked alongside the character.

Voice actors and profile

Field Details
Birthplace Hyperborean Empire
Birthday October 9
Affiliation Unaffiliated
Voice actors Jack Ayres (EN), KENN (JP), 呂思衡 (CN), 장서화 (KR)

If you play around his transformation windows — stacking Adagio deliberately, landing the fourth hit or a plunge on time, and pushing into Devotion — Phantasio delivers elite DPS with clear, repeatable patterns. Keep a healer close, build for Max Sanity and skill throughput, and his risk‑reward kit clicks into place.