Relic EXP BookLost Essence
Lost Essence is a 5★ material in Honkai: Star Rail — see how to get it, its use, and related items right below on this page.
Lost Essence is a material ★5 in Honkai: Star Rail. This item is not currently used to level up any character or Light Cone.
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 2000 Relic EXP.
Lore
A large Fragmentum dust crystal that had densified after being reduced to its original form. "It can even recreate our deceased mother if it has enough information! It really can! Even if it was only for 26 seconds... I just have one question after I completed the experiment: Just why was the Fragmentum created?"
Stats
| Rarity | ★★★★★ |
| Type | Relic EXP Book |
| EXP value | 2,000 |
| Stack limit | 99,999 |
Official names in every language
| Tiếng Việt | Tinh Túy Đánh Mất |
| English | Lost Essence |
| 日本語 | 遺失精華 |
| 한국어 | 유실된 정수 |
| 繁體中文 | 遺失精粹 |
| 简体中文 | 遗失精粹 |
Where to use it / Related tools
Lost Essence 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 Essence?
Enhancement material for Relics. Provides 2000 Relic EXP.
Where do you get Lost Essence?
Official drop/source data for Lost Essence isn't published yet — check back after the next data sync.
What type of item is Lost Essence?
Lost Essence is a 5★ material in Honkai: Star Rail, in the “Relic EXP Book” category.
What is Lost Essence used for?
Lost Essence currently isn't listed as required by any character ascension, Light Cone ascension, or crafting recipe in official data.
How much EXP does Lost Essence give?
Lost Essence gives 2,000 EXP when used to level up.