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Honkai: Star Rail

That Which Shall Be Mission Guide

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♦ Latest: Version 3.8 Update
♦ Phase 1: The Dahlia & Firefly
♦ Phase 2: Fugue & Lingsha
♦ Phase 3: Aglaea & Sunday
♦ Events: Chrysos Awoo Championship

Honkai Star Rail - That Which Shall Be

That Which Shall Be is a Finality Mission in Honkai: Star Rail that is part of the Memories are the Prelude to Dreams mission series. Check out how to unlock this mission, its walkthrough, and the rewards for completion in this guide!

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Every Dawn of the World -

List of Contents

That Which Shall Be Information

Mission Type Finality Mission
Location Penacony, Golden Hour
Required Level 34

Part of Memories are the Prelude to Dreams Mission Series

Honkai Star Rail - Memories are the Prelude to Dreams

That Which Shall Be is the eighth quest for the Memories are the Prelude to Dreams Mission Series.

Memories are the Prelude to Dreams Mission Guide

How to Unlock That Which Shall Be

Unlock Requirements

How to Unlock Reach Trailblaze Level 34 or above
Complete Stranger in a Strange Land

Complete Every Dawn of the World Mission

Honkai Star Rail - Every Dawn of the World

That Which Shall Be can be unlocked once you reach Trailblaze Level 34 or above and have completed Every Dawn of the World mission.

Every Dawn of the World Mission Guide

That Which Shall Be Walkthrough

How to Complete That Which Shall Be

  • Step 1: Check Out the Black Cat in the Room
  • Step 2: Reclaim the Bygone Past
  • Step 3: Decide the Fate of the Sweet Dream

Check Out the Black Cat in the Room

HSR That Which Shall Be - Step 1

You'll return to The Dahlia's hideout. After the conversation, investigate the black cat on the couch next to The Dahlia to proceed.

Reclaim the Bygone Past

HSR That Which Shall Be - Step 2

Back in the Golden Hour, you must retrieve more of your forgotten memories from the memory fragments in the area. To complete this section, you must speak to the following pairs: Jade and Robin, Aventurine and Dr. Ratio, Silver Wolf and The Dahlia, and Black Swan and Acheron.

Decide the Fate of the Sweet Dream

HSR That Which Shall Be - Step 3
No. I know this was a promise. Immediately lets you fulfill the promise with Firefly.
Alright. Let's say our goodbyes here. Continuously say goodbye to exit the conversation. Afterwards, you can either leave the area or return to Firefly to fulfill the promise.

Once you meet up with Firefly again at the Dream of Gnawing Oak, there will be a section that leads to branching paths. Depending on the one you choose, you'll get a different achievement after completing the mission. The two options shown above lead to different scenarios.

Fulfill the Promise with Firefly

HSR That Which Shall Be - Step 3.1

If you choose to fulfill the promise with Firefly, you'll get to spend time with her at The Radiant Feldspar again. This scenario also offers more illustrated CGs.

After seeing the rest of the cutscenes, you'll return to the Astral Express. Simply investigate the note on the table to wrap up the mission. This ending grants you the Memories are the Prelude to Dreams achievement!

Leave from Here

HSR That Which Shall Be - Step 3.2

If you decide to say goodbye to Firefly and leave, you'll be brought back to Dreamflux Reef. Go into The Dahlia's secret base and investigate her desk to see a fragment of Remembrance she left behind. This ending grants the Oblivion is the Curtain Call of Dreams achievement instead.

That Which Shall Be Rewards

Mission Rewards
Star Rail - Stellar Jade Item Stellar Jade x80 Star Rail - Refined Aether Item Refined Aether x6 Star Rail - Lost Crystal Item Lost Crystal x6
Star Rail - Clock Credits Item Clock Credits x300 Star Rail - Credit Item Credit x80000

Honkai: Star Rail Related Guides

All Missions and Mission Types

Other Memories are the Prelude to Dreams Guides

Honkai Star Rail - Memories are the Prelude to Dreams

Memories are the Prelude to Dreams
1 Another One, Same One
2 Nonexistent Iron Cavalry
3 The Gala of Crossed Destinies
4 The Dream Split in Two
5 The Moment Before My Death
6 Omen in the Trees
7 Every Dawn of the World
8 That Which Shall Be

Memories are the Prelude to Dreams

All Trailblaze Missions

Prologue: Herta Space Station
1 Today Is Yesterday's Tomorrow
Chapter 1: Jarilo-VI
2 In the Withering Wintry Night
3 In the Sweltering Morning Sun
Chapter 2: The Xianzhou Loufu
4 Windswept Wanderlust
5 Topclouded Towerthrust
6 Karmic Clouds Faded, War Banners Folded
Chapter 3: Penacony
7 The Sound and the Fury
8 Cat Among Pigeons
9 In Our Time
10 Farewell, Penacony
11 A New Venture on the Eighth Dawn
Chapter 4: Amphoreus
12 Heroic Saga of Flame-Chase
13 Light Slips the Gate, Shadow Greets the Throne
14 Through the Petals in the Land of Repose
15 The Fall at Dawn's Rise
16 For the Sun is Set to Die
17 Before Their Deaths
18 Back to Earth in Evernight
19 As Tomorrow Became Yesterday

All Trailblaze Missions

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