Echoes of War Bosses are the weekly bosses in Honkai: Star Rail that drop rare items like Light Cones and Trace Upgrade Materials. See all the weekly bosses, their weaknesses, and the best teams against them in this guide!

New and Upcoming Echoes of War Bosses

New Echoes of War Boss in Version 2.5

Enemy	Weaknesses
Shadow of Feixiao and Ecliptic Inner Beast	Physical Fire Quantum

The Shadow of Feixiao and Ecliptic Inner Beast weekly boss was just released in the Version 2.5 update.

How to Unlock Feixiao Boss

Clear Finest Duel Under the Pristine Blue: Part II

Shadow of Feixiao and Ecliptic Inner Beast can be unlocked after completing the Under the Spell mission during the Finest Duel Under the Pristine Blue: Part II Trailblaze Continuance!

Finest Duel Under the Pristine Blue: Part II

Echoes of War Bosses (Weekly Bosses)

List of All Weekly Bosses and Drops

Boss	Drops	Weaknesses
Doomsday Beast		Physical Fire Ice Wind
Cocolia, Mother of Deception		Fire Lightning Quantum
Phantylia the Undying		Lightning Wind Imaginary
Starcrusher Swarm King - Skaracabaz (Synthetic)		Physical Ice Imaginary
Harmonious Choir - The Great Septimus		Fire Lightning Imaginary
Shadow of Feixiao and Ecliptic Inner Beast		Physical Fire Quantum

Echoes of War Best Team Comps

All Team Comps
Doomsday Beast	Cocolia	Phantylia
Starcrusher Swarm King	The Great Septimus	Shadow of Feixiao

Best Teams for Doomsday Beast

F2P Team
March 7th	Asta	Dan Heng	Natasha
Burn Team
Himeko	Hook	Asta	Bailu

As the first boss of the game, the Doomsday Beast and its parts are weak to the elements of the story characters. All enemies here are notably weak to Fire DMG so bring multiple characters from this Element!

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Best Team for Cocolia

F2P Team
Trailblazer (Fire)	Serval	Qingque	Natasha
Burn Team
Himeko	Trailblazer (Fire)	Hook	Bailu

Cocolia, Mother of Deception, and the Lances she summons are weak to Fire DMG, so it's better to have two to three characters with Fire Element on your team.

A Single Target DPS like Seele can also work to bring down Cocolia as fast as possible.

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Best Team for Phantylia the Undying

F2P Team
Dan Heng	Serval	Yukong	Natasha
Premium Hyper Carry Team
Jing Yuan	Tingyun	Bronya	Luocha

Phantylia the Undying and her Lotuses are all weak to Lightning DMG so characters like Serval or Jing Yuan are great choices for this boss fight so the player can attack all of them simultaneously.

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Best Team for Starcrusher Swarm King

F2P Team
Trailblazer	Herta	March 7th	Natasha
Premium Hyper Carry Team
Jingliu	Ruan Mei	Pela	Luocha

The Starcrusher Swarm King is weak to Physical and Ice DMG so characters who deal Physical AoE DMG like Physical Trailblazer or Jingliu are good for targeting all of them at once.

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Best Team for The Great Septimus

F2P Team
Trailblazer (Imaginary)	Serval	Asta	Lynx
Premium Hyper Carry Team
Imbibitor Lunae	Sparkle	Trailblazer (Imaginary)	Luocha

The Great Septimus is weak to Imaginary, Fire, and Lightning so characters who deal AoE DMG like Imbibitor Lunae or Himeko are good for targeting all of its minions at once.

Characters that focus on Break Effect like Trailblazer (Imaginary) is great for this fight also since you will have to deplete multiple bars of Toughness!

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Best Team for Shadow of Feixiao

F2P Team
Xueyi	Asta	March 7th (Imaginary)	Lynx
Premium Hyper Carry Team
Firefly	Trailblazer (Imaginary)	Ruan Mei	Gallagher

The Shadow of Feixiao and Ecliptic Inner Beast is weak to Physical, Fire, and Quantum. Wind is also a great option since some summons are weak to it.

The key to beating this Echoes of War is to Weakness Break the enemies, so characters who can deal a lot of Toughness DMG like Firefly and Boothill are recommended.

How to Unlock Echoes of War

Unlocked After Fighting Cocolia, Mother of Deception

You can unlock the weekly bosses or Echoes of War bosses once you defeated Cocolia, Mother of Deception during the In the Dangerous Swamp Mission. Teleport to the nearest space anchor to where you first fought them to get to their location.
Cocolia, Mother of Deception Boss Fight Guide

Weekly Bosses Resets Every Monday

The weekly bosses for Honkai: Star Rail resets every Monday at 4 AM according to the time of the server you're playing.

Here's the schedule for the weekly resets for each server region.

Server	Weekly Reset Time
America	Monday at 4:00 AM UTC-5
Europe	Monday at 4:00 AM UTC+1
Asia	Monday at 4:00 AM UTC+8

What Time Do Servers Reset?

Honkai: Star Rail Related Guides

List of All Bosses

Echoes of War Weekly Bosses

Doomsday Beast	Cocolia, Mother of Deception	Phantylia the Undying
Starcrusher Swarm King - Skaracabaz (Synthetic)	Harmonious Choir - The Great Septimus	Shadow of Feixiao and Ecliptic Inner Beast

Echoes of War Weekly Bosses and Drops

Stagnant Shadows Field Bosses

Disciples of Sanctus Medicus - Shape Shifter	Ice Out of Space	Decaying Shadow
Frigid Prowler	Automaton Direwolf	Blaze Out of Space
Guardian Shadow	Stormbringer	Voidranger - Trampler
The Ascended	Aurumaton Gatekeeper	Abundance Sprite - Malefic Ape
Searing Prowler	Aurumaton Spectral Envoy	Dreamjolt Troupe's Sweet Gorilla
Dreamjolt Troupe's Beyond Overcooked	Memory Zone Meme - Shell of Faded Rage	Senior Staff - Team Leader
Present Inebriated in Revelry	Howling Casket

Stagnant Shadow Field Bosses and Drops