Light Cone EXP BookSparse Aether
Sparse Aether is a 2★ material in Honkai: Star Rail — see how to get it, its use, and related items right below on this page.
Sparse Aether is a material ★2 in Honkai: Star Rail. This item is not currently used to level up any character or Light Cone. Obtainable from 6 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
Enhancement material for Light Cones, provides 500 Light Cone EXP.
Lore
An imaginary substance that shouldn't exist in reality. The basic material to create Light Cones. The images contained in the Light Cones become clearer when infused with this substance. "I see, so this is the supposed 'memoria' of the Garden of Recollection. No wonder the Memokeepers can set off on galactic voyages with memories."
How to obtain
- Calyx: Backwater Pass
- Calyx: Divination Commission
- Calyx: A Child's Dream
- Calyx: "Strife Ruins" Castrum Kremnos
- Calyx: "Dovebrook District"
- Assignment rewards
Stats
| Rarity | ★★ |
| Type | Light Cone EXP Book |
| EXP value | 500 |
| Stack limit | 99,999 |
Official names in every language
| Tiếng Việt | Aether Loãng |
| English | Sparse Aether |
| 日本語 | 希薄なエーテル |
| 한국어 | 희박한 에테르 |
| 繁體中文 | 稀薄乙太 |
| 简体中文 | 稀薄以太 |
Where to use it / Related tools
Sparse Aether is used to level up Light Cones — see which Light Cones need this material.
Sparse Aether is an upgrade material — check the Material Planner to see how much you need for the character you're building.
Same-type items
FAQ
What is Sparse Aether?
Enhancement material for Light Cones, provides 500 Light Cone EXP.
Where do you get Sparse Aether?
Sources for Sparse Aether: Calyx: Backwater Pass · Calyx: Divination Commission · Calyx: A Child's Dream · Calyx: "Strife Ruins" Castrum Kremnos · Calyx: "Dovebrook District" · Assignment rewards. See the “How to obtain” section above for details on each source.
What type of item is Sparse Aether?
Sparse Aether is a 2★ material in Honkai: Star Rail, in the “Light Cone EXP Book” category.
What is Sparse Aether used for?
Sparse Aether currently isn't listed as required by any character ascension, Light Cone ascension, or crafting recipe in official data.
How much EXP does Sparse Aether give?
Sparse Aether gives 500 EXP when used to level up.