Trace Material

★★★

Oath of Steel

Oath of Steel is a 3★ material in Honkai: Star Rail. See how to get it and which characters/light cones need it below.

3★Trace Material

4Used to upgrade

12Used for Light Cones

4How to obtain

Oath of Steel is a material ★3 in Honkai: Star Rail. 4 characters need this item to level up. 12 Light Cones need this item to level up. Obtainable from 4 different sources in-game.

Last updated: 30/07/2026

The figures on this page come directly from gamevika's internal game data store (counted/read straight from the real records), not an estimate or copy from elsewhere.

Description

A shield forged with irreplaceable craftsmanship from an unknown alloy. Used to level up Traces moderately for Preservation characters.

Lore

It may be a large shield, but it feels as light as a feather. Even after taking on a full charge, no marks can be seen on the face of the shield. Ancient legends tell of a war where high-spirited warriors wielded deathray-beaming spears and shields forged of Frost Steel, defended a nation destined to falter in the face of war. This shield is a witness to that war. "Powerful voices chant: 'The enemies are at our gates!'"

Farm it smart

A Trace (skill tree) material. Harsh truth: traces devour materials late-game, especially levels 8–10. Do not level evenly — pour into Skill/Ultimate (your main damage) first, Basic ATK last.

Material Planner →

How to obtain

Calyx (Supply Zone)
Omni-Synthesizer — Material Synthesis
Embers Exchange
Omni-Synthesizer — Material Exchange

Used to upgrade

4 characters / light cones need this material

×54

March 7th

×69

Gepard

×69

Fu Xuan

×54

Trailblazer

Used for Light Cones

12 Light Cones need this item

Amber

Defense

Pioneering

Day One of My New Life

×9

Landau's Choice

×9

Trend of the Universal Market

×9

We Are Wildfire

×9

This Is Me!

×9

Destiny's Threads Forewoven

×12

Moment of Victory

×12

She Already Shut Her Eyes

×12

Texture of Memories

Stats

Rarity	★★★
Type	Trace Material
Stack limit	99,999

Official names in every language

Tiếng Việt	Lời Thề Sắt Lạnh
English	Oath of Steel
日本語	寒鉄の誓い
한국어	한철의 맹세
繁體中文	寒鐵的誓言
简体中文	寒铁的誓言

Where to use it / Related tools

Material Planner →

Oath of Steel is an upgrade material — check the Material Planner to see how much you need for the character you're building.

Same-type items

Tears of Dreams Shattered Blade Lifeless Blade Worldbreaker Blade Arrow of the Beast Hunter Arrow of the Demon Slayer Arrow of the Starchaser Key of Inspiration Key of Knowledge Key of Wisdom Endurance of Bronze Safeguard of Amber Obsidian of Dread Obsidian of Desolation Obsidian of Obsession Harmonic Tune Ancestral Hymn Stellaris Symphony Seed of Abundance Sprout of Life Flower of Eternity Borisin Teeth Lupitoxin Sawteeth Moon Rage Fang Meteoric Bullet Destined Expiration Countertemporal Shot Rough Sketch Dynamic Outlining Exquisite Colored Draft

← All items Material Planner →

FAQ

What is Oath of Steel?

A shield forged with irreplaceable craftsmanship from an unknown alloy. Used to level up Traces moderately for Preservation characters.

Where do you get Oath of Steel?

Sources for Oath of Steel: Calyx (Supply Zone) · Omni-Synthesizer — Material Synthesis · Embers Exchange · Omni-Synthesizer — Material Exchange. See the “How to obtain” section above for details on each source.

What type of item is Oath of Steel?

Oath of Steel is a 3★ material in Honkai: Star Rail, in the “Trace Material” category.

What is Oath of Steel used for?

Oath of Steel is used by 4 characters, 12 Light Cones.

Understand the mechanics behind this 4

Trailblaze Power guide: best ways to spend it, Fuel, Jade refreshes, and your daily farming route→ Efficient Material Farming in Honkai: Star Rail: Calyx, Stagnant Shadow, Echo of War, and a Weekly Route→ Assignments Guide: Who to Send Where for Max Passive Materials and Credits→ How to Farm Credits in Honkai: Star Rail (Never Go Broke Leveling Traces & Relics)→