As Tomorrow Became Yesterday
Last updated 2026-02-23

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This article is about the Trailblaze Mission chapter. For other uses, see As Tomorrow Became Yesterday (Disambiguation).
As Tomorrow Became Yesterday is the nineteenth Trailblaze Mission chapter in Honkai: Star Rail. It takes place on Amphoreus.
Overview
You who brings this story to a close, please have no regrets. Just remember us... and remember this tale that had a beginning and an end.
Mission List
- Dawn, Caress the Distant Lands Once More
- Traverse Stars and Stride Cosmos
- The Witch's Ardent Research
- Hero, Return to Dawn in Mortality
- Pages, Ripples That Engrave Memories
- Silver Chariot, Part With That Humanity's Epic
- Fallen Petals, Leave Fading Traces of Fragrance
Summary
Dawn, Caress the Distant Lands Once More
Dawn, Caress the Distant Lands Once More
To complete the Titan's trial, you must slumber for a millennium in Amphoreus, awakening at dawn at the end of this cycle. Your companions will await you beyond the west winds, to embark with you on the final journey.
Traverse Stars and Stride Cosmos
Traverse Stars and Stride Cosmos
Facing the threat of Irontomb, cosmic forces allied under the leadership of the Astral Express. Himeko, Welt, and others entered Amphoreus according to plan, witnessing the moment you transformed into the Worldbearing Titan and traversed the sky dome.
The Witch's Ardent Research
In search of Demiurge's whereabouts, Herta and Screwllum went to the Great Tomb of the Nameless Titan, where they finally learned about Demiurge's origin from Lygus. Herta held a crisis meeting among the Genius Society, announcing that she would break Irontomb's seal and, if necessary, carry out the Self-Coronation in Irontomb's place.
Hero, Return to Dawn in Mortality
Hero, Return to Dawn in Mortality
The Ruins of Time is where Phainon sealed Irontomb's hatred with his sacrifice. You venture deep into the ruins alongside the former Chrysos Heirs, now Titans, dissolving Khaslana's obsession. Irontomb breaks through the earth, and you must face and defeat this Lord Ravager.
Pages, Ripples That Engrave Memories
Pages, Ripples That Engrave Memories
In an instant, Irontomb's hatred incinerated the cosmic civilizations' life data. At the crucial moment, Herta was able to first complete her coronation, while Cyrene protected the memories of all cosmic life. In this eternal chapter, you truly embarked on the Path of Remembrance, completing a cosmic-scale Era Nova, then returned to the battlefield with your companions to extinguish this flame of Destruction.
Silver Chariot, Part With That Humanity's Epic
Silver Chariot, Part With That Humanity's Epic
After battling Irontomb, you woke up in your room and are surprised to find the Chrysos Heirs aboard the Astral Express. Perhaps this is the last chance to remember and bid farewell to these companions before this epic story comes to an end.
Fallen Petals, Leave Fading Traces of Fragrance
Fallen Petals, Leave Fading Traces of Fragrance
Though Irontomb was defeated, with Fuli's absence, the causality that should have been anchored by the Remembrance remained unstable. To prevent Irontomb's resurgence, Cyrene, as a Pure Child of Anāsrava, voluntarily stepped into the past, using all her strength to ensure the story of Amphoreus completed its cycle in the past... The journey's beginning was also the story's end.
Achievements
There are 10 Achievements related to As Tomorrow Became Yesterday:
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Name | Category | Description | Hidden | Version | |
|---|---|---|---|---|---|---|
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The End of Light | The Rail Unto the Stars | Behold, where the chariot charges forth lies dawn and victory ※ Witness the Trailblazer, manifesting as the Express, traversing the skies |
No | 3.7 | 10 |
|
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Love, Peach, and Crystal Flower | The Rail Unto the Stars | Can a heart bloom when watered by time? ※ Reveal the secret of PhiLia093 and Demiurge |
No | 3.7 | 10 |
|
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The Final Grand Journey | The Rail Unto the Stars | The prisoner laughs at the puppet, asking who is more absurd ※ Arrive at the Ruins of Time |
No | 3.7 | 10 |
|
|
The Apocalypse and Its Four Footnotes | The Rail Unto the Stars | The right side of the equation, the Erudition, falls silent ※ Witness the moment the Destruction descends |
No | 3.7 | 10 |
|
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The End Is Also the Primordial Chaos | The Rail Unto the Stars | Write a footnote for god's proof ※ Prove to Nous... or not |
No | 3.7 | 10 |
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Her Soul Is the Entire Universe | The Rail Unto the Stars | The stars shall witness Amphoreus's answer ※ "Hello, World" |
No | 3.7 | 10 |
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O Muse, Tell Me | The Rail Unto the Stars | Within the Light Cone, all is fated ※ Write the final sentence of this epic |
No | 3.7 | 20 |
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The Beddings of Memories | Fathom the Unfathomable | With March 7th's assistance, temporarily enhance the power of Oronyx's Prayer | No | 3.7 | 5 |
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Kephale Will Never Forget This | Fathom the Unfathomable | Pass the trial of "Worldbearing" and witness the hope and despair of days gone by | No | 3.7 | 5 |
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Frost and Flame | The Memories We Share | Kindness is like a torch. It burns brighter when shared ※ After bidding farewell to Amphoreus, return to the Jarilo-VI Administrative District |
No | 3.7 | 5 |
Other Languages
| Language | Official Name |
|---|---|
| English | As Tomorrow Became Yesterday |
| Chinese (Simplified) | 成为昨日的明天 |
| Chinese (Traditional) | 成為昨日的明天 |
| Japanese | 明日は昨日に |
| Korean | 어제의 내일이 되어 |
| Spanish | Hacia ese mañana del ayer |
| French | Vers ce demain d'autrefois |
| Russian | Стать вчерашним завтра |
| Thai | พรุ่งนี้ที่หวนสู่วันวาน |
| Vietnamese | Ngày Mai Trở Thành Hôm Qua |
| German | Das Morgen wird zum Gestern |
| Indonesian | Kala Esok Bangkit dari Bayang Kemarin |
| Portuguese | O Amanhã Que Antecede a Sua Véspera |
Change History
Released in Version 3.7
- Updated English voice-over resources for Welt in Traverse Stars and Stride Cosmos, Hero, Return to Dawn in Mortality, and Silver Chariot, Part With That Humanity's Epic.
- As Tomorrow Became Yesterday was released.
