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Honkai: Star Rail
Memory of Chaos Stage 12 Guide for Version 4.0
★ Exclusive: Check out the State of Meta in 4.0!
♦ Latest: 4.1 Livestream Redeem Codes
♦ Phase 2: Sparkxie, Sparkle, Cerydra, Rappa
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♦ Events: Cosmicon, Roll On!, Ding! Arcadia Fun-Time Clock-In Essentials
See how to beat Forgotten Hall's Memory of Chaos Stage 12 in Honkai: Star Rail Version 4.0 with this guide! We've got the best teams, recommended characters, and rewards for Cyber Mystery here.
Memory of Chaos Stage 12 Info
Memory of Chaos Stage 12 Details
Stage Objectives
| Objectives | ♦ Win with at least 10 cycle(s) left ♦ Win with at least 20 cycle(s) left ♦ Have no downed characters |
|---|
Type Weaknesses
| Cyber Mystery | |
|---|---|
| First Half | 
|
| Second Half |  
|
Current Memory of Chaos Phase
| Cyber Mystery | |
|---|---|
| At the start of each wave or Cycle, gains 5 Punchline points). When obtaining Punchline, adds a corresponding amount of Charge to "Memory Turbulence," stacking up to 50 points. At the start of every Cycle, "Memory Turbulence" deals 1 instance of True DMG to enemy targets based on the amount of Charge points. |
|
| Phase Duration | 03/02/2026 - 04/13/2026 |
Memory of Chaos Stage 12 Best Teams
Cyber Mystery Best Teams
First Half
Second Half
| Castorice DPS | |||
|---|---|---|---|
 Castorice |  Evernight |  Cyrene |  Hyacine |
| Archer DPS | |||
 Archer |  Sparkle |  Yao Guang |  Aventurine |
| Firefly DPS | |||
 Firefly |  The Dahlia |  Fugue |  Lingsha |
| F2P Team | |||
| Archer |  Xueyi |  Trailblazer (Ice) |  Lynx |
| Phainon DPS | |||
|---|---|---|---|
 Phainon |  Sunday |  Cerydra |  Permansor Terrae |
| Anaxa DPS | |||
 Anaxa | Sunday | Cerydra | Permansor Terrae |
| The Herta DPS | |||
 The Herta | Sunday | Cerydra | Permansor Terrae | F2P Team |
 Dan Heng |  Herta |  Asta | Permansor Terrae |
Use Fire Units in the First Half
Enemies in the first half are weak to Fire. Quantum units are also viable for Wave 2.
We recommend using teams with a Main DPS and a Sub-DPS that deals AoE damage to deal with Sparxicon.
Use Physical and Wind Units in the Second Half
Enemies in the second half are weak to Physical and Wind. We recommend teams that can deal AoE DMG or high Toughness DMG against Lygus.
How to Beat Stage 12 - Cyber Mystery
Cyber Mystery First Half
Defeat the Canvas Peacock First
For Wave 1, focus your attacks on the Canvas Peacock to implant a Weakness. Inflict Weakness Break on the Canvas Peacock to deal additional damage.
Defeat Sub-Field Enemies
During Wave 2, SparxiConOfficial will select one target to be transferred to another field. Choose a DPS character to take down the enemies in the other field.
Cyber Mystery Second Half
Avoid Using Ultimates in the Antimony State
Lygus can put your characters into an Antinomy State, which activates their Ultimates but at the cost of taking massive damage.
Try not to use your Ultimates during the Antimony State unless you can provide sufficient healing as soon as possible.
Memory of Chaos Stage 12 Rewards
Completion Rewards
| All Rewards | ||
|---|---|---|
 Lost Crystal
x2 |
 Lucent Afterglow
x8 |
 Traveler's Guide
x2 |
 Refined Aether
x1 |
 Credit
x10000 |
|
Honkai: Star Rail Related Guides
Forgotten Hall - Memory Guides
| The Last Vestiges of Towering Citadel Stages | ||||
|---|---|---|---|---|
| Stage 1 | Stage 2 | Stage 3 | Stage 4 | Stage 5 |
| Stage 6 | Stage 7 | Stage 8 | Stage 9 | Stage 10 |
| Stage 11 | Stage 12 | Stage 13 | Stage 14 | Stage 15 |
Memory of Xianzhou Guides
| The Voyage of Navis Astriger Stages | ||
|---|---|---|
| Stage 1 | Stage 2 | Stage 3 |
| Stage 4 | Stage 5 | Stage 6 |
Memory of Chaos Guides
| Memory of Chaos Stages | |||
|---|---|---|---|
| Stage 1 | Stage 2 | Stage 3 | Stage 4 |
| Stage 5 | Stage 6 | Stage 7 | Stage 8 |
| Stage 9 | Stage 10 | Stage 11 | Stage 12 |
Comment
16 
Anonymous 9 months
Anonymous 9 monthsClearly dev have never playtested V3.3 MOC12 while MOC11 is super ez. Not only Hoolay has so many consecutive moves, he also has a lot of HP. At this rate I think even until 2030 they won't reduce MOC12 boss' overly-inflated HP, not even worth playing. For those haven't tried, just go until MOC11 srsly
Author
Memory of Chaos Stage 12 Guide for Version 4.0
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I don't know if this helps anyone but I finally this in under 10 turns using Hysilens/Kafka/Ruan Mei/Gallagher against Svarog. If you have Robin, you can switch her instead of Ruan Mei. For Aventurine, I did the standard Hyacine/Castorice/Tribbie/RTB. Tribbie had been using an S1 DDD! but I traded it out for an S5 Cogs. Way more Ults for Tribbie. Brute force, rely on Mem's True DMG and Action Advance and make sure to spend all of Pollux the turn before the Mad Party so you don't breath dice.