Honkai: Star Rail

Forgotten Hall - Memory Stage 15 Guide

Honkai Star Rail - Forgotten Hall - Memory Stage 15 Guide

See how to beat Forgotten Hall - Memory Stage 15 in Honkai: Star Rail with this guide! We've got the best teams, recommended characters, and rewards here.

Memory Stage 15 Info

Memory Stage 15 Details

Memory Turbulence At the beginning of each cycle, increases the DMG taken by all enemies by 35%, lasting until the enemies' next action begins.
Objectives ♦ Win with at least 12 cycle(s) left
♦ Win with at least 18 cycle(s) left
♦ No more than 1 downed characters
Recommended Types
(First Half)
ImaginaryPhysicalLightning
Recommended Types
(Second Half)
QuantumLightningFire

Memory Stage 15 Best Teams

Best Team Setups for Stage 15

First Half Teams

Argenti DPS
Star Rail - ArgentiArgenti Star Rail - TingyunTingyun Star Rail - HanyaHanya Star Rail - HuohuoHuohuo
Dr. Ratio DPS
Star Rail - Dr. RatioDr. Ratio Star Rail - PelaPela Star Rail - HanyaHanya Star Rail - AventurineAventurine
Imbibitor Lunae DPS
Star Rail - Imbibitor LunaeImbibitor Lunae Star Rail - PelaPela Star Rail - YukongYukong Star Rail - LuochaLuocha
F2P Team
Star Rail - ServalServal Star Rail - YukongYukong Star Rail - TrailblazerTrailblazer Star Rail - March 7thMarch 7th

Most enemies here, including Gepard, are weak to Physical and Imaginary elements so it would be nice to have a character with either of those elements.

Second Half Teams

Seele Carry
Star Rail - SeeleSeele Star Rail - BronyaBronya Star Rail - SparkleSparkle Star Rail - Fu XuanFu Xuan
Himeko-Topaz DPS
Star Rail - HimekoHimeko Star Rail - TopazTopaz Star Rail - AstaAsta Star Rail - BailuBailu
Acheron DPS
Star Rail - AcheronAcheron Star Rail - GuinaifenGuinaifen Star Rail - Silver WolfSilver Wolf Star Rail - Fu XuanFu Xuan
F2P Team
Star Rail - QingqueQingque Star Rail - Dan HengDan Heng Star Rail - AstaAsta Star Rail - NatashaNatasha

The Shadewalker and Cocolia are weak to Fire, so bring at least one or two to easily break their weaknesses. Asta is a great character for this half as she can easily destroy Cocolia's toughness using her Skill.

Quantum characters like Seele and Qingque are also great to use as all enemies aside from an Ice Edge are also weak to the element. You can also opt to use one Lightning character to have all weaknesses covered.

Other Characters

First Half
Star Rail - ClaraClara Star Rail - KafkaKafka Star Rail - YanqingYanqing Star Rail - LukaLuka
Second Half
Star Rail - HookHook Star Rail - Jing YuanJing Yuan Star Rail - GuinaifenGuinaifen Star Rail - GallagherGallagher

Memory Stage 15 Enemies

First Half Enemies

Wave 1 Enemies Weaknesses
PhysicalIce
ImaginaryPhysicalIce
QuantumWind
Wave 2 Enemies Weaknesses
ImaginaryPhysicalLightning
ImaginaryPhysicalIce
PhysicalIce

Second Half Enemies

Wave 1 Enemies Weaknesses
QuantumPhysicalFire
Wave 2 Enemies Weaknesses
QuantumLightningFire
Ice Edge (Left Summon) x1
LightningFire
Ice Edge (Right Summon) x1
QuantumFire

How to Beat Memory Stage 15

Stage 15 First Half

Defeat the Soldiers First

Star Rail - Forgotten Hall Memory Stage 15 - Take out Gepard

During the second wave, Gepard will appear alongside two Silvermane Guards who have the ability to buff him up. Gepard can also summon soldiers when there are none available by his side

Defeat the soldiers as soon as they appear to keep them from buffing Gepard's DMG.

Use AoE Attacks to Destroy Gepard's Shield

Star Rail - Forgotten Hall Memory Stage 15 - Use an AoE Attack to remove Gepard

When Gepard casts a Garrison Aura Field, he can shield the rest of his teammates. Use AoE attacks to destroy all of the shields as soon as possible.

Ready Up Shields and Healing

Star Rail - Forgotten Hall Memory Stage 15 - Bring a shielder or a healer in the party

A lot of Gepard's attacks can deal with a lot of DMG and can hit the entire party. If one of your party members is at below 50% HP, use a shield or heal them as soon as possible to ensure they survive Gepard's attacks.

Stage 15 Second Half

Break Cocolia's Weakness when she's Charging Up

Star Rail - Forgotten Hall Memory Stage 15 - Break Cocolia

At the beginning of the battle, try to lower Cocolia's toughness as much as you can. Do not break her Weakness right away until she casts Wrath of Winterland Saints.

When she charges up to do Wrath of Winterland Saints, she'll be dealing with a lot of DMG in her next turn. Break her weakness before her next turn to avoid taking a huge chunk of DMG.

Prioritize Cocolia's Summons

Star Rail - Forgotten Hall Memory Stage 15 - Destroy Cocolia

Cocolia will summon two Ice Edges that can deal additional DMG to the entire party. Focus on taking the Ice Edges out first before Cocolia to minimize DMG.

Memory Stage 15 Rewards

Completion Rewards

All Rewards
Star Rail - Lost Crystal  Item Lost Crystal x10 Star Rail - Lucent Afterglow Item Lucent Afterglow x40 Star Rail - Traveler Traveler's Guide x5
Star Rail - Refined Aether Item Refined Aether x4 Star Rail - Credit Item Credit x20000

You can only claim the rewards for Memory Stage 15 once.

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