Core Mechanics of Forgotten Hall / Memory of Chaos
Honkai: Star Rail’s Forgotten Hall, more commonly known as Memory of Chaos, is the endgame mode where players chase high-difficulty challenges and earn massive, valuable rewards. It uses a layered structure, with every stage split into two halves, and each half capped at a strict 12-turn time limit. Enemy setups change from floor to floor, but every successful run revolves around three core pillars: consistent damage output, solid survivability, and tight turn efficiency.
Unlike regular story or casual content, Memory of Chaos has extremely variable enemy compositions. For example, some floors force enemies to spawn with specific weaknesses, or require players to face off against high-health, high-resistance elite enemies. This means a single fixed team comp can never work for every scenario, so players must flexibly adjust their team members and speed ordering based on the current floor’s enemy weaknesses, movement patterns, and active buffs.
Core Principles for Team Building
Balancing Your Damage Core and Support Roles
A standard well-built team usually includes one main damage dealer (main DPS), one sub-DPS or weakness-break specialist, one support that provides damage buffs and energy cycling, and one survivability slot that offers either shields or healing. For example, a classic 4-star focused comp is Silver Wolf, Tingyun, Natasha, and Jing Yuan. 5-star damage dealers like Dan Heng Imbibitor Lunae, a powerful periodic damage dealer that can carry teams on his own, need a support squad built to create consistent space for his damage output.
Choosing the right support is incredibly important. Tingyun offers massive damage buffs and energy recharge for a single-target main DPS, while Asta boosts your entire party’s attack and improves overall weakness break efficiency. Matching your support to your main DPS’s damage cycle lets you concentrate burst damage more effectively, cutting down the number of turns you need to clear the stage.
The Necessity of a Survivability Slot and Alternate Options
In Memory of Chaos, damage output is important, but your survivability slot is almost always the actual key to locking in a clear. Natasha, the free-to-access healer, provides consistent steady recovery, while Bailu and Huohuo offer much stronger single-target and area-of-effect healing. Shield-focused characters like March 7th prevent party members from getting one-shot at critical moments by blocking incoming damage before it can drop your team.
For players chasing fastest possible clear times, you can test out an all-in damage build that skips a dedicated survivability slot entirely. This requires a deep understanding of enemy attack patterns, and the ability to avoid fatal damage through precise crowd control like freeze or entanglement. This build is extremely high risk, and only suitable for experienced players who know the mode’s mechanics inside and out.
Proven Clear Strategies and Approaches
Strategies For Single-Target Boss Fights
When facing a high-health single-target boss, your goal should be to focus all firepower for a quick kill. Using weakness break to interrupt the boss’s actions or trigger helpful special mechanics is the single best way to shorten your fight. For team building, prioritize picking a single-target DPS that matches the boss’s weakness, and pair them with a high-power damage buff support. For example, Dan Heng Imbibitor Lunae’s massive single-target damage will completely outperform other options when facing a boss with Imaginary weakness.
For turn ordering, you should always let your damage buff support act first, to make sure your main DPS gets the maximum possible damage boost when it’s their turn to attack. At the same time, keep a close eye on the boss’s energy bar, and use weakness break or crowd control skills to interrupt its turn right before it can unleash a devastating high-damage ultimate ability.
Team Builds For Fighting Groups of Enemies
In multi-enemy fights, AoE damage coverage and weakness break efficiency become your top priorities. Characters that can apply weakness break to multiple targets at once (like Kafka and Asta) perform extremely well in these encounters. You can consider running two full damage dealers, or one main DPS paired with a sub-DPS, to quickly clear out smaller adds before they can overwhelm your team with stacked damage.
Survival pressure is generally lower in these fights, but you still need to watch out for stacking enemy debuffs. Bringing a character with AoE healing or AoE shielding will effectively keep your entire party’s health stable. If enemies have a weakness to crowd control, you can also bring a dedicated control character to cut down pressure on your front line.
Improving Your Build and Breaking Through Stuck Floors
Upgrade Priority for Light Cones and Relics
When you’re working with limited resources, you should prioritize upgrading your light cones and relics to hit key stat breakpoints first. For damage dealers, aim to hit a healthy ratio of crit rate to crit damage, ideally around a 1:2 ratio. Support characters should prioritize stacking energy regeneration efficiency, to keep their skill and ultimate cycle running smoothly through every fight.
Relic choice should always center around your character’s core mechanics. For example, Dan Heng Imbibitor Lunae benefits from specific stats on the Champion of Streetwise Boxing physical set or the Thief’s Prison imaginary set, while Tingyun prioritizes the Musketeer of Wild Wheat attack set or the Space Sealing Station attack set to maximize her damage buff output.
Breaking Common Stuck Points: Survival and Energy Cycle Problems
Most players get stuck on floors not because they lack enough damage, but because their team’s survivability falls apart or their energy cycle breaks down. If you have enough damage to kill enemies but can’t keep your team alive, you should first check the investment level of your survivability character, or consider swapping a pure damage slot for a hybrid damage-and-survivability character. If your energy cycle can’t keep up with the pace of the fight, you’ll need to adjust your support’s speed and energy recharge to make sure your main DPS has their ultimate ready when it matters most.
Another common stuck point comes up when facing special mechanics that require a specific tool, like needing to break a single-target shield or quickly clear powerful enemy buffs. In these cases, it’s worth leaving a flexible slot open for a character that can handle the special mechanic, even if their general damage output is lower than other options. They can play a decisive role that leads to a clear on that specific floor.
Summary
The biggest challenge of Memory of Chaos comes from its dynamic, ever-changing nature. There is no absolute best team that works for every scenario, only the best team comp for the specific floor you’re facing right now. We recommend that whenever a new update or new floor cycle launches, you first review the enemy composition, then adjust your team based on the characters you have available in your roster. Experimenting with different speed orders and skill rotation sequences will often lead to unexpected breakthroughs.
Remember, upgrading your characters and gear is the foundation, but adjusting your strategy to fit the current floor is the real key to clearing high-difficulty Memory of Chaos. Good luck to all Trailblazers — we hope you smoothly clear every floor and grab all those valuable full-star rewards with no hassle.