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)
Recommended Types (Second Half)

Memory Stage 15 Best Teams

Best Team Setups for Stage 15

First Half Teams

Argenti DPS
Argenti	Tingyun	Hanya	Huohuo
Dr. Ratio DPS
Dr. Ratio	Pela	Hanya	Aventurine
Imbibitor Lunae DPS
Imbibitor Lunae	Pela	Yukong	Luocha
F2P Team
Serval	Yukong	Trailblazer	March 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
Seele	Bronya	Sparkle	Fu Xuan
Himeko-Topaz DPS
Himeko	Topaz	Asta	Bailu
Acheron DPS
Acheron	Guinaifen	Silver Wolf	Fu Xuan
F2P Team
Qingque	Dan Heng	Asta	Natasha

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
Clara	Kafka	Yanqing	Luka
Second Half
Hook	Jing Yuan	Guinaifen	Gallagher

Memory Stage 15 Enemies

First Half Enemies

Wave 1 Enemies	Weaknesses
Silvermane Gunner x1
Silvermane Cannoneer x2
Silvermane Soldier x1
Wave 2 Enemies	Weaknesses
Gepard x1
Silvermane Cannoneer x1
Silvermane Gunner x1

Second Half Enemies

Wave 1 Enemies	Weaknesses
Everwinter Shadewalker x3
Wave 2 Enemies	Weaknesses
Cocolia x1
Ice Edge (Left Summon) x1
Ice Edge (Right Summon) x1

How to Beat Memory Stage 15

Stage 15 First Half

Defeat the Soldiers First

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

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

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

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

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
Lost Crystal x10	Lucent Afterglow x40	Traveler's Guide x5
Refined Aether x4	Credit x20000

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

Honkai: Star Rail Related Guides

Forgotten Hall Guide

Forgotten Hall - Memory Guides

Memory of Jarilo-VI Guide

Memory of Xianzhou Guides

Memory of Xianzhou Guide

Memory of Chaos Guides

Memory of Chaos Guide for Version 2.5