The Day The Cosmos Fell
For the Path of: EruditionThe Day The Cosmos Fell is a 4★ Light Cone for the Path of Erudition in Honkai: Star Rail.
A farmable 4-star Erudition cone that grants flat ATK plus a strong CRIT DMG boost when an AoE attack hits at least 2 enemies with matching Weakness, making it a solid pick for many blast/AoE damage dealers.
The Day The Cosmos Fell is a Light Cone for the Erudition Path. Ranked A on the Light Cone tier list. Best paired with Rappa. Needs 7 material types to reach Lv.80.
Last updated: 31/07/2026
The figures on this page come directly from gamevika's internal game data store (counted/read straight from the real records), not an estimate or copy from elsewhere.
Effect
Increases the wearer's ATK by 16%. When the wearer uses an attack and at least 2 attacked enemies have the corresponding Weakness, the wearer's CRIT DMG increases by 20%, lasting for 2 turn(s).
Is Superimposition S1 → S5 worth it?
Base Stats (Lv80)
| Lv. | HP | ATK | DEF |
|---|---|---|---|
| 1 | 43 | 22 | 15 |
| 20 | 166 | 83 | 58 |
| 30 | 160 | 80 | 56 |
| 40 | 229 | 114 | 80 |
| 50 | 298 | 149 | 104 |
| 60 | 367 | 184 | 128 |
| 70 | 436 | 218 | 152 |
| 80 | 505 | 253 | 176 |
Best Characters
A solid build option for Rappa (not the #1 pick, but still in the recommended group).
Ascension Materials
Characters who use this
Story
"Molten Cheese Tart! You are in charge of disarming the planet's lookouts with your charm!" "Gray Bean Paste! You will be in charge of breaching the planet's line of defense!" "Salty Rimeplume! Bring us the head of the planet's leader!" "My lord, what are you going to do!" "I shall pretend to be an adorable kitten to befuddle these stupid humans!" That day, the Cosmos remembered... the terror of being ruled by them.
Alternative cones on the same Path
Trivia & Origins
HoYoverse's own game data has no gacha table pairing this cone with a specific character, and the internal flavor text doesn't name one either — not enough evidence to assign a signature owner, no guessing.
Frequently Asked Questions
What does The Day The Cosmos Fell do?
Increases the wearer's ATK by 16%. When the wearer uses an attack and at least 2 attacked enemies have the corresponding Weakness, the wearer's CRIT DMG increases by 20%, lasting for 2 turn(s).
What does The Day The Cosmos Fell do at Superimposition 5 (S5)?
Increases the wearer's ATK by 24%. When the wearer uses an attack and at least 2 attacked enemies have the corresponding Weakness, the wearer's CRIT DMG increases by 40%, lasting for 2 turn(s).
Who should use The Day The Cosmos Fell?
Based on cross-source consensus builds, this cone works best on: Rappa, The Herta.
How many materials does it take to ascend The Day The Cosmos Fell to Lv.80?
You need 7 material types and 308,000 Credits to ascend the cone to Lv.80 (see the table above for details).
How to read this Light Cone page
Every Light Cone has exactly one passive effect tied to the wielder's combat performance; that effect scales up as you Superimpose it from S1 to S5 — use the S1-S5 buttons above to see the exact numbers at each level instead of guessing or interpolating. A Light Cone only delivers its full value on a character who shares its Path; "Characters who use this cone" lists every character on that Path, while "Best users" is a narrower list pulled from real build consensus, not a guess.
Base stats (HP/ATK/DEF) are shown at Lv80 for every cone of the same rarity so they can be compared directly; a 5-star cone will always edge out 4-star and 3-star ones here — the real difference lives in the passive effect, not the flat stats. The "Alternative cones on the same Path" section suggests a few other options if you do not own the signature cone yet, or want to compare before spending ascension materials.
See the full list on the Light Cones page, or check terms in the HSR Glossary.
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