Even in 2026, with Honkai: Star Rail expanding into new worlds and introducing fresh faces, Phantylia the Undying remains one of the most memorable Echo of War encounters. Players first meet her during the Topclouded Towerthrust Trailblaze Missions on the Xianzhou Luofu, and she quickly establishes herself as a threat. She might look intimidating, but with the right team and a little patience, this boss battle can become a walk in the park. Here is everything Trailblazers need to know before stepping into the Scalegorge Waterscape.
Where To Find Phantylia The Undying
Before players can challenge Phantylia again for weekly rewards, they must complete all Topclouded Towerthrust Trailblaze Missions. The final mission, 'A Dragon Gallant, Its Ocean Distant', ends with a scripted battle against Phantylia. After that, the Echo of War version unlocks. To find it, players should head to The Xianzhou Luofu map and select 'Scalegorge Waterscape'. This is the last area visited during that mission. On the western side of the map, past the Palace Ruin Depths Space Anchor, the Echo of War: Divine Seed challenge awaits. This is where Phantylia can be fought repeatedly.
The main reason to return is the reward: Regret of Infinite Ochema, a Trace Material used by several characters. As of 2026, the Echo of War rotation may include more bosses, but Phantylia remains a valuable weekly stop for anyone building Wind, Imaginary, or Lightning units.
How To Defeat Phantylia The Undying
Phantylia's weaknesses are Wind, Imaginary, and Lightning. Building a team around those types makes the fight significantly easier. She also has Frozen RES and Entanglement RES, meaning Ice characters cannot freeze her, and Quantum characters cannot entangle her. Players should avoid relying on those effects. All of her attacks deal Wind DMG, and she can summon Abundance Lotuses. Here is the kicker: those lotuses remove Skill Points from the team, so poor Skill Point management can ruin a run.
| Category | Details |
|---|---|
| Weaknesses | Wind, Imaginary, Lightning |
| Resistances | Frozen RES, Entanglement RES |
| Damage Type | Wind DMG |
| Summons | Abundance Lotuses (drain Skill Points) |
| Debuffs | Healing block in later phases |
| Key Reward | Regret of Infinite Ochema |
In the second and final phases, Phantylia applies debuffs that prevent some team members from healing HP. This is where a cleanser becomes essential. Players should bring a character who can dispel debuffs, such as Luocha, Natasha, Bronya, or another support with cleanse utility. Without one, the fight can spiral quickly.
Skill Point Management
The Abundance Lotuses are the biggest nuisance. They drain Skill Points, so players should pick one character, usually the Main DPS, to be the main Skill Point user. Another character can use Normal Attacks only, which keeps the Skill Point pool healthy. This simple rule prevents the team from running dry when it matters most. Players should also destroy the lotuses quickly to stop the drain.
Recommended Team Framework
A reliable team usually includes:
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Main DPS: Blade, Dan Heng • Imbibitor Lunae, Jing Yuan, Kafka, Acheron, or Feixiao. Any strong Wind, Imaginary, or Lightning damage dealer works.
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Buffer: Bronya, Tingyun, Asta, or Yukong. These characters amplify the Main DPS and help end phases faster.
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Healer / Cleanser: Luocha, Natasha, or Bailu. Luocha is especially comfortable because of his automatic cleanse.
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Flex Sustain: March 7th, Fu Xuan, or another defensive option. The goal is to survive the Wind DMG and healing-block debuffs.
In 2026, newer supports and sustain units can make the fight even smoother, but the core rules remain unchanged. Players do not need the newest five-star roster to win. They just need to respect the mechanics.
Final Tips
Phantylia rewards preparation more than raw power. Players should:
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Match her weaknesses with Wind, Imaginary, or Lightning damage.
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Avoid Ice and Quantum teams that depend on Frozen or Entanglement.
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Assign one Main DPS as the Skill Point user.
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Use another character's Normal Attack to generate Skill Points.
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Bring a cleanser for the healing-block debuffs.
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Kill Abundance Lotuses before they drain too many Skill Points.
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Save ultimates for phase transitions to burst her down.
Don't sweat it if the first attempt fails. Phantylia is a puzzle boss, and once the team composition clicks, she becomes a regular weekly farm. Even in 2026, with Honkai: Star Rail's growing roster, she remains a solid test of fundamentals. Trust me: a little Skill Point discipline and a good cleanser go a long way. With the right setup, the Undying will not stay undying for long.