Relic EXP BookLost Lightdust
Lost Lightdust is a 2★ material in Honkai: Star Rail — see how to get it, its use, and related items right below on this page.
Lost Lightdust is a material ★2 in Honkai: Star Rail. This item is not currently used to level up any character or Light Cone. Obtainable from 1 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 Relics. Provides 100 Relic EXP.
Lore
Lightdust permeated the Fragmentum, carrying what seems to indicate the existence of another civilization. "Theosophy holds that the database used to store information of the material world is called the Akasha Records. I don't necessarily support this, but... these dust indeed store information from the past. They are like... seeds? When you water them, they can yield bountiful fruit."
How to obtain
- Salvage Relic
Stats
| Rarity | ★★ |
| Type | Relic EXP Book |
| EXP value | 100 |
| Stack limit | 99,999 |
Official names in every language
| Tiếng Việt | Bụi Sáng Đánh Mất |
| English | Lost Lightdust |
| 日本語 | 遺失光塵 |
| 한국어 | 유실된 라이트더스트 |
| 繁體中文 | 遺失光塵 |
| 简体中文 | 遗失光尘 |
Where to use it / Related tools
Lost Lightdust 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 Lost Lightdust?
Enhancement material for Relics. Provides 100 Relic EXP.
Where do you get Lost Lightdust?
Sources for Lost Lightdust: Salvage Relic. See the “How to obtain” section above for details on each source.
What type of item is Lost Lightdust?
Lost Lightdust is a 2★ material in Honkai: Star Rail, in the “Relic EXP Book” category.
What is Lost Lightdust used for?
Lost Lightdust currently isn't listed as required by any character ascension, Light Cone ascension, or crafting recipe in official data.
How much EXP does Lost Lightdust give?
Lost Lightdust gives 100 EXP when used to level up.