The guide on Doomsday Beast, Prologue Boss fight in Herta Space Station for Honkai: Star Rail. Includes Location, Weakness, Best Team Comps, Build, Battle tips, debuffs and Skills.
Table of Contents
| Warning! | This article includes spoilers for Prologue: Today Is Yesterday's Tomorrow. Please proceed with caution when reading. |
Doomsday Beast Location & Requirements
In The Supply Zone Of Herta Space Station
| Location | Herta Space Station - Supply Zone |
| How To Unlock | Complete Prologue: Today Is Yesterday's Tomorrow |
| Combat Type |     Weakness: RES: None Debuff RES: Crowd Control Debuff |
| Trailblaze Power Cost *In Echo of War | 30 |
| Rewards |    Destroyer's Final Road Relic「Musketeer of Wild Wheat」 Relic「Thief of Shooting Meteor」Lucent Afterglow 4-Star Light Cone "Quid Pro Quo" 4-Star Light Cone "Fermata" 4-Star Light Cone "We Are Wildfire" 4-Star Light Cone "River Flows in Spring" 4-Star Light Cone "Past and Future" 4-Star Light Cone "Woof! Walk Time!" 4-Star Light Cone "The Seriousness of Breakfast" |
| Rewards Refresh | 04:00 AM every Monday |
Can Be Rematched In Echo of War After Completing Herta Space Station
Defeating Doomsday Beast in the storyline will unlock it as an enemy in Echo of War. This play mode allows players to battle enhanced chapter bosses and earn 4-star Light Cones and exclusive Trace upgrade materials.
The Rewards Are Required For Some Characters' Trace Enhancement
To enhance certain characters, you need unique materials, which can only be obtained in Echo of War three times weekly. Since you need a lot of materials, we recommend challenging Echo of War each week after it is unlocked.
| Characters using Destroyer's Final Road for Trace Enhancement | |||
 Physical Trailblazer |  Trailblazer (Fire) |  Himeko |  Welt |
 March 7th |  Dan Heng |  Arlan |  Asta |
 Herta |  Tingyun |  Jing Yuan | |
Recommended Team Compositions
Tips To Team Up
DPS With Fire or Physical Type Is Recommended
Although the Doomsday Beast's body has no Weaknesses or Resistances, both its hand parts and Antimatter Engine are weak to Fire-type attacks. Once all parts are destroyed, the Doomsday Beast's body must also be reduced to zero HP within one turn. Therefore, it is recommended to use a Physical-type DPS that can exploit the weakness of the durable Engine.
Also Include A Fire-Type Character For Toughness DMG
Each part of the Doomsday Beast is weak to Fire-type attacks and acts every turn. To trigger the Weakness Break, include characters with Fire-type AoE or random consecutive attacks.
| Himeko | Asta | Trailblazer (Fire) |
| Blast/AoE Follow-up attacks | Random consecutive attacks DMG Buff | AoE *Not available in storyline |
Physical Trailblazer Team Build
| Physical Trailblazer | Himeko | Asta |  Natasha |
| DPS Single target/AoE | DPS Fire-type AoE | DMG Buff Toughness DMG | Healer Debuff Remover |
A team centered on the Physical Trailblazer, who is available from the beginning. He can be used for single-target attacks and AoE, depending on the situation. Paired with Himeko and Aster, who can exploit weaknesses in every part of the enemy's body, allowing you to trigger the Weakness Break frequently. Additionally, Natasha's skills can remove Quantum Entanglement and Imprisonment.
Storyline Team
| Physical Trailblazer | March 7th | Dan Heng | Himeko |
| DPS Single target/AoE | Shielder *Cannot inflict Frozen | DPS Inflicts SPD Debuff | DPS *For Trial |
For the first encounter with the boss, most people will be using these characters. Keep attacking with Physical Trailblazer, Dan Heng, and Himeko (Trial). As the enemy doesn't deal high damage in the first encounter, it is possible to finish it without a Healer by simply applying March 7th's Shield at pivotal moments.
Doomsday Beast Battle Walkthrough
| 1 | Defeat one hand (right hand) first |
| 2 | Attack the remaining hands and engine |
| 3 | Reduce its HP to zero when it is downed |
| 4 | Remove Quantum Entanglement/Imprisonment if possible |
1. Defeat One Hand (Right Hand) First
Each part of the Doomsday Beast has its own HP and acts at every turn. The Antimatter Engine boosts both hands and unleashes a potent AoE, and its durability is high, so it is recommended to target the right hand of the Doomsday Beast first, which has low durability and inflicts Imprisonment on all targets.
2. Attack The Remaining Hands And Engine
Once one of the hands is destroyed, use random consecutive attacks or blasts to defeat the remaining hands and engine. After that, focus on reducing the main body's HP to zero in one turn. To maximize your attack, make sure to accumulate enough Ultimate and Skill Points beforehand.
3. Reduce Its HP To Zero When It Is Downed
Once you defeat all the parts and the main body is downed, use single-target attacks like Skill or Ultimate to bring its HP down to zero in one turn. Keep in mind that the main body has no Weakness Type, so Weakness Break won't work. If you fail to defeat it before the next turn, all of its parts will be revived and you'll have to start over.
4. Remove Quantum Entanglement/Imprisonment If Possible
When the hands of the Doomsday Beast attack, there is a chance that it may inflict Quantum Entanglement or Imprisonment. Even though the chance is low, it can limit your actions when you are inflicted. It is recommended to have a debuff remover on your team to quickly remove it.
Doomsday Beast Skills
Skills In The First Half
| Doomsday Beast | |
| [Talent] Leviathan's Lingering Power | The Doomsday Beast cannot be attacked until the Antimatter Engine, Disaster's Right Hand, and Dawn's Left Hand have been destroyed. |
| Antimatter Engine | |
| Stats |   Weakness: RES: / Crowd Control Debuffs |
| Skills | Void Fission: Enhances Disaster's Right Hand, restoring its Toughness. Calamity Strike: Enhances Dawn's Left Hand, restoring its Toughness. Total Annihilation: Deals Imaginary DMG to a single target. |
| Disaster's Right Hand | |
| Stats | Weakness: RES: / Crowd Control Debuffs |
| Skills | Calamity Tear: Deals minor Imaginary DMG to all targets. Tough Cuts: Deals minor Imaginary DMG to all targets, with a small chance to inflict Imprisonment on the target. |
| Dawn's Left Hand | |
| Stats | Weakness: RES: / Crowd Control Debuffs |
| Skills | Fallen Forge Hammer: Deals Quantum DMG to a single target. Fallen Star's Visit: Deals Quantum DMG to a single target, with a small chance to inflict Entanglement. |
Skills In The Second Half
| Doomsday Beast | |
| [Talent] Leviathan's Lingering Power | The Doomsday Beast cannot be attacked until the Antimatter Engine, Disaster's Right Hand, and Dawn's Left Hand have been destroyed. |
| Antimatter Engine | |
| Stats | Weakness: RES: / Crowd Control Debuffs |
| Skills | Impending Doom: Deals Quantum DMG to all targets. Engine Boost: Grants the Enhanced status to all friendly units except the user, restoring their Toughness. Total Annihilation: Deals Imaginary DMG to a single target. Cataclysm Precursor: Enters the Charge state. The next action uses "Impending Doom" on all targets. |
| Disaster's Right Hand | |
| Stats | Weakness: RES: / Crowd Control Debuffs |
| Skills | Tough Cuts: Deals minor Imaginary DMG to all targets, with a small chance to inflict Imprisonment on the target. The Breakdown of Tyranny: Deals Imaginary DMG to all targets, with a small chance to cause Imprisonment. |
| Dawn's Left Hand | |
| Stats | Weakness: RES: / Crowd Control Debuffs |
| Skills | Fallen Star's Visit: Deals Quantum DMG to a single target, with a small chance to inflict Entanglement. When the Dawn Is Dark: Deals Quantum DMG to a single target, with a chance to inflict Entanglement. |
Honkai: Star Rail Related Guides
Recommended For Beginners
Early Game Tips
 Early Game Guide | |
 Daily To Do's |  Reroll Tier List |
Character Builds And Leveling Up
 Character Build Guide | |
 Level Up Guide |  Ascension Guide And Materials |
 How To Reroll Relics |  Upgrade Light Cones |
Game Mechanics
 Trailblaze Level Guide |  Best Team Comps |
| Settings Guide | Consumables Guide |
| How To Change Profile | How To Add Friends |
| Data Bank Explained | Messages Guide |
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