Eroded Horn is a weekly boss talent material in Genshin Impact, dropped by Lord of Eroded Primal Fire. This page lists which characters use Eroded Horn, how many each one needs, and how to farm it, as of version 7.0.
- Dropped by
- Lord of Eroded Primal Fire
- Domain
- Crimson Witch of Embers
- Used by
- 3 characters
- Per character
- 6 per talent, 18 for all three
Characters who use Eroded Horn
Each of these characters needs Eroded Horn for every talent level from 7 to 10, and no other weekly boss material.
Escoffier5★ Cryo
Mavuika5★ Pyro
Illuga4★ Geo
| Character | Rarity | Element | Weapon | Region |
|---|---|---|---|---|
| Escoffier | 5★ | Cryo | Polearm | Fontaine |
| Mavuika | 5★ | Pyro | Claymore | Natlan |
| Illuga | 4★ | Geo | Polearm | Nod-Krai |
How many Eroded Horn you need
Talent levels 7 and 8 take 1 each and levels 9 and 10 take 2 each: 6 per talent, 12 for Skill and Burst, 18 for all three. Taking every character above to 10/10/10 would take 54, roughly 20 clears of Lord of Eroded Primal Fire at 2.7 materials a clear, counting the Eroded Scale-Feather and Eroded Sunfire it also drops as converted with Dream Solvent (the same assumption the calculator makes).
Most players stop well short of that. The Trounce Domain Recommender reads your account export, subtracts what you already own and ranks all 14 weekly bosses by what you are actually short of.
Where to farm Eroded Horn
Lord of Eroded Primal Fire, in Liyue, drops Eroded Horn, Eroded Scale-Feather and Eroded Sunfire. Your first three weekly boss rewards each week cost 30 Original Resin and later ones 60. A spare Eroded Scale-Feather or Eroded Sunfire can be turned into Eroded Horn with Dream Solvent, 1 for 1, so a surplus from the same boss is never wasted.
Which weekly boss should you farm this week?
The Trounce Domain Recommender works it out from your own characters and inventory.
Open the weekly boss calculatorQuestions
Which characters use Eroded Horn?
3 characters as of Genshin 7.0: Escoffier, Mavuika and Illuga.
How many Eroded Horn do I need?
6 per talent taken from level 6 to 10 (1 each at levels 7 and 8, 2 each at 9 and 10), so 12 for Skill and Burst and 18 for all three talents. Talent levels 1 to 6 use none.
Where do I get Eroded Horn?
From Lord of Eroded Primal Fire, the weekly boss in the Crimson Witch of Embers domain (Liyue). Each clear drops 2 to 3 of its talent materials, a mix of Eroded Horn, Eroded Scale-Feather and Eroded Sunfire, and Dream Solvent converts between the three 1 for 1.
Genshin Impact 7.0 data from genshin-db, the same data the calculators on this site use. Updated .