The Forgotten Hall stands as Honkai: Star Rail’s ultimate challenge, a layered gauntlet where strategy, timing, and synergy decide whether your team rises or collapses under pressure. Hidden mechanics, shifting rules, and escalating rewards turn each floor into a puzzle only the most prepared Trailblazers can conquer.
The Forgotten Hall is composed of two parts: Memory and Memory of Chaos. Memory is a permanent set of 15 stages that you need to complete to unlock Memory of Chaos. Memory of Chaos is a group of 10 stages that changes out every few weeks. Players familiar with Genshin Impact may find it similar to Spiral Abyss, which functions similarly.
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How to access Forgotten Hall in Honkai: Star Rail
Access Forgotten Hall through the overworld map after reaching Trailblaze Level 21. Open the map by pressing M on PC or tapping the star map icon on mobile/console. Spot the Hall of Forgotten icon in the top-right corner near the Simulated Universe. Select it to enter and pick a difficulty level from Memory of Chaos stages. Clear stages by defeating enemy waves within turn limits using your best team setups.
You can access Forgotten Hall from the train Parlor Car, once it unlocks at around Trailblaze Level 21.
Stage 1-10 of Memory will require only four party members, but from stages 11-15, you’ll need two teams of four. All of the Memory of Chaos stages require two teams of four characters.
Gameplay for Forgotten Hall goes as follows:
- You’ll select four or eight characters (depending on the stage) to fight the enemies listed.
- Each stage has a buff that occurs at the beginning of every cycle to help you fight.
- You can use Techniques to heal and buff your team before combat.
- You cannot use food or access your inventory or party make-up.
- If you die, you’ll have to start that stage over from the beginning again, even if you already cleared one fight.
Each stage (regardless of its a Chaos stage or not) has three objectives. Two objectives involve winning the fights within a certain amount of cycles (turns in combat) and winning without having a character die. For each objective you fulfill, you’ll earn an Insignia, and you’ll get 200 Stellar Jade and 20,000 Credits for every three Insignias you get.
The enemies start off easier and get harder as you progress further in Forgotten Hall, with the last enemies in Memory stage 15 being level 65. This means you’ll have to do quite a bit of grinding before you can clear out Memory completely. Enemies in Memory of Chaos start off at level 68 and get higher, so this is Honkai: Star Rail‘s endgame content.
Best team comps for Memory of Chaos stages
Memory of Chaos (MoC) in Honkai: Star Rail rotates stages bi-weekly, with team comps tailored to enemy weaknesses, buffs, and cycle limits-top clears emphasize hypercarries, DoT spreads, or Break teams using current meta units like Castorice, Kafka, and Phainon. Comps evolve per cycle (as of early 2026 guides for versions 3.6-3.8), prioritizing Quantum/Fire/Physical weaknesses and sustains like Dan Heng Permansor Terrae or Lingsha.
Top Universal Comps
These flexible setups dominate recent MoC based on guides:
| Team Type | Core DPS | Supports/Sustain | Best For |
|---|---|---|---|
| Remembrance Break | Castorice | Evernight/Tribbie, Trailblazer (Remembrance), Hyacine/Lingsha | AoE waves, summon buffs |
| DoT Spread | Kafka/Hysilens | Black Swan, Tribbie, Dan Heng Permansor Terrae | Multi-target DoT ticks, sustain |
| Hypercarry Archer | Archer | Sparkle, Cyrene/Tribbie, Dan Heng | Single-target bosses, skill spam |
| Super Break | Firefly/Phainon | The Dahlia/Fugue, Sunday, Lingsha/Dan Heng | Physical/Fire breaks, hypercarry |
Stage-Specific Tips
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First Half (e.g., Stage 12 v3.8): Quantum/Fire weak enemies favor Castorice (Castorice + Cyrene/Tribbie + Trailblazer + Hyacine) or Archer/SPD teams; DoT with Kafka/Hysilens/Black Swan for Lightning coverage.
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Second Half: Physical-heavy like Phainon (Phainon + Sunday + Cerydra + Dan Heng) or Firefly Super Break; reuse DoT if sustains hold.
Aim for E1+ on DPS, speed-tune leads (134+ SPD breakpoints), and leverage Memory Turbulence (e.g., summon DMG or SP recovery). Test in Simulation Universe for rotations.
Best relics and light cones for Castorice MoC teams
Castorice excels in Memory of Chaos as a Remembrance DPS, leveraging her Memosprite (dragon summon) for high HP-scaling Quantum damage, especially in AoE Break teams.
Best Light Cones
Her signature Make Farewells More Beautiful (5★ Remembrance) is BiS, boosting Max HP by 30%, granting DEF ignore on HP loss (up to 30%), and advancing her action by 12% when the Memosprite disappears-perfect for cycle efficiency.
Alternatives include Sweat Now, Cry Less (4★ Battle Pass) for 20% CRIT Rate and 36% shared DMG with dragon on-field, or high-HP stat sticks like Time Waits for No One. F2P: Reminiscence (3★) for up to 48% DMG when dragon acts.
Optimal Relics
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Poet of Mourning Collapse (4pc): Best set, boosting Memosprite DMG (2pc) and granting 20-32% CRIT Rate if base SPD < threshold (with HP boots), despite minor SPD penalty-pairs perfectly with her HP scaling.
Main stats: Body CRIT DMG, Feet HP%, Sphere HP% or Quantum DMG%, Rope HP%; prioritize HP% (8,500+ target), CRIT Rate/DMG, flat HP subs.
Substitutes: Standard HP/CRIT sets if Poet unavailable.
Planar Ornaments
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Bone Collection’s Serene Demesne (2pc): Top pick for 12% HP and 28% CRIT DMG at 5,000+ HP (easy threshold).
Alternatives: Wondrous BananAmusement Park (dragon on-field CRIT DMG) or Sigonia for multi-enemy clears. Rope/Body as above.
MoC Team Synergy Notes
Stack with Remembrance buffers like Tribbie/Evernight, Trailblazer (Remembrance), and sustains (Hyacine/Luocha) for buffs/heals amid HP drain; aim 134+ SPD on lead.
