Trace MaterialKey of Wisdom
Key of Wisdom is a 4★ material in Honkai: Star Rail. See how to get it and which characters/light cones need it below.
Key of Wisdom is a material ★4 in Honkai: Star Rail. 6 characters need this item to level up. 12 Light Cones need this item to level up. Obtainable from 3 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 mythical key that appears in the hands of the greatest prodigies of the cosmos. Used to level up Traces significantly for Erudition characters.
Lore
This is the proof of invitation to the halls of the Nous Temple. Finding the door of which this key opens is a far more arduous task than obtaining the key itself. Those who pass through the doors will immediately realize the impossibility of returning to this side. "The Erudition does not have answers to the universe, but it will teach you how to ask the right questions."
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 (Rivet Town)
- Omni-Synthesizer — Material Synthesis
- Omni-Synthesizer — Material Exchange
Used to upgrade
Used for Light Cones
Stats
| Rarity | ★★★★ |
| Type | Trace Material |
| Stack limit | 99,999 |
Official names in every language
| Tiếng Việt | Chìa Khóa Trí Tuệ |
| English | Key of Wisdom |
| 日本語 | 叡智のカギ |
| 한국어 | 지식의 열쇠 |
| 繁體中文 | 智識之鑰 |
| 简体中文 | 智识之钥 |
Where to use it / Related tools
Key of Wisdom 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 Key of Wisdom?
A mythical key that appears in the hands of the greatest prodigies of the cosmos. Used to level up Traces significantly for Erudition characters.
Where do you get Key of Wisdom?
Sources for Key of Wisdom: Calyx (Rivet Town) · Omni-Synthesizer — Material Synthesis · Omni-Synthesizer — Material Exchange. See the “How to obtain” section above for details on each source.
What type of item is Key of Wisdom?
Key of Wisdom is a 4★ material in Honkai: Star Rail, in the “Trace Material” category.
What is Key of Wisdom used for?
Key of Wisdom is used by 6 characters, 12 Light Cones.