Fatal Weakness is the Day 5 stage of Honkai: Star Rail's Stellar Shimmer event. Check out the best teams, how to beat Supergiant difficulty, and all the rewards in this Day 5 guide!

Stellar Shimmer Event Guides
Day 1	Day 2	Day 3	Day 4
Day 5	Day 6	Day 7	Day 8

Stellar Shimmer Day 5 Best Teams

Fatal Weakness Premium Team

Stellar Shimmer Day 5 Premium Team
Boothill	Ruan Mei	Bronya	Gallagher

Boothill and Ruan Mei are the trial characters for Day 5.

A Super Break team composed of Boothill, Ruan Mei, Bronya, and Gallagher is recommended for Day 5. This team greatly boosts Boothill's Break Effect and grants him consecutive actions, which helps him break enemy weaknesses much faster.

Other Recommended Characters

Support

If you don't have a built Gallagher, you can also go with healers like Huohuo or Luocha. Huohuo can regenerate Energy and buff ATK while Luocha can help bring down the toughness of Imaginary-weak enemies.

Fatal Weakness F2P Team

Stellar Shimmer Day 5 F2P Team
Boothill	Ruan Mei	Trailblazer (Imaginary)	Natasha

In this F2P team, you can use the Imaginary Trailblazer to further increase Boothill's Break Effect and deal Super Break DMG. Natasha's Basic Attacks can also be used to chip away enemy toughness quicker.

How to Beat Day 5 Supergiant Star

Quickly Get Weakness Breaks

The Day 5 stage mechanic features the Contusion debuff, which increases the damage taken by enemies and deals extra instances of Break DMG every time your team attacks.

Contusion stacks up when an enemy receives Break DMG, so it's best to break their weakness as soon as you can. Focus on enemies with more Contusion stacks to defeat them much faster!

Prevent Gepard's Summons

You should ideally get a Weakness Break on Gepard before he's able to summon other mobs on the field. Try to buff Boothill's Break Effect through your supports as much as possible before it's his turn to attack!

Gepard Enemy Guide

Stellar Shimmer Day 5 Stage Details

Fatal Weakness Trial Characters

Trial	Character Build
Boothill	Cruising in the Stellar Sea Iron Cavalry Against the Scourge Talia: Kingdom of Banditry
Ruan Mei	Memories of the Past Messenger Traversing Hackerspace Fleet of the Ageless

Fatal Weakness Stage Mechanic

Fatal Weakness Objectives

Fatal Weakness Enemies

Dwarf Star Enemies

Enemy	Weakness
Silvermane Lieutenant
Voidranger - Reaver
Silvermane Gunner

Supergiant Star Enemies

Enemy	Weakness
Gepard
Voidranger - Trampler
The Ascended
Silvermane Lieutenant
Voidranger - Reaver
Silvermane Gunner

Stellar Shimmer Day 5 Rewards

Challenges	Rewards
Complete the Fatal Weakness "Dwarf Star" mode challenge	Stellar Jade x30 Traveler's Guide x3 Credit x30000
Eliminate 3 wave(s) of enemies in the Fatal Weakness "Supergiant Star" mode challenge	Stellar Jade x30 Dynamic Outlining x5
Eliminate 4 wave(s) of enemies in the Fatal Weakness "Supergiant Star" mode challenge	Relic Remains x15 Lost Gold Fragment x5
Eliminate 5 wave(s) of enemies in the Fatal Weakness "Supergiant Star" mode challenge	Relic Remains x5 Credit x20000

Fatal Weakness Information

Day 5 Stage of Stellar Shimmer Event

Fatal Weakness is the Day 5 stage of the Stellar Shimmer combat event. The Day 5 stage effects involve dealing Break DMG to build up Contusion stacks that increase your team's damage.

Stellar Shimmer Event Guide

Honkai: Star Rail Related Guides

Stellar Shimmer Event Guide

Stellar Shimmer Day Guides

Stage	Trial Characters
Day 1	◆ Firefly ◆ Harmony Trailblazer
Day 2	◆ Acheron ◆ Silver Wolf
Day 3	◆ Topaz ◆ Robin
Day 4	◆ Imbibitor Lunae ◆ Sparkle
Day 5	◆ Boothill ◆ Ruan Mei
Day 6	◆ Argenti ◆ Huohuo
Day 7	◆ Jade ◆ Herta
Day 8	◆ Kafka ◆ Black Swan

Other Upcoming and Current Events

All Events and Schedules