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In Honkai: Star Rail, you can obtain Cavern Relics through several in-game activities, with Caverns of Corrosion serving as the dedicated route for farming them. Relic crafting uses Relic Remains, but the official Version 3.5 notes only confirm the Self-Modeling Resin change and its monthly synthesis limit; they do not provide a complete current crafting walkthrough.
What Relics do
Cavern Relics are equipment that raise a character’s stats. Wearing multiple pieces from a set can also activate additional effects. Because set bonuses have different effects and activation conditions, choose a set according to the character’s needs rather than assuming one set is best for everyone. HoYoWiki’s Cavern Relics guide describes their stat and set-bonus functions, while its relic index lists individual set effects.
How to get Relics
Farm Caverns of Corrosion
Caverns of Corrosion are the targeted option when you want to farm Cavern Relics. HoYoWiki also notes that Relics can be obtained as you progress, but describes Caverns of Corrosion as a more efficient way to obtain them. The available official guide does not state drop rates or expected farming yields. See the HoYoWiki Cavern Relics guide.
Other listed source categories
The official relic index lists these acquisition categories:
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- Cavern of Corrosion
- Simulated Universe
- World Exploration
- Divergent Universe
- Echo of War
These are broad categories, not a promise that every activity awards every set or that all routes are equally efficient. The index does not provide a complete step-by-step route, unlock requirements, costs, or drop rates for each set. Check the set entry and the activity in-game before planning a specific farm. Browse the official relic index.
How Relic crafting works—and what is confirmed
Relic crafting involves Relic Remains and Self-Modeling Resin, but the official materials cited here do not document every current Omni-Synthesizer step or cost. In particular, they do not establish the exact Relic Remains cost for choosing an individual Relic or all the customization options available, so check the current in-game Omni-Synthesizer rather than relying on an unverified recipe.
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HoYoverse’s Version 3.5 update notes say Wishful Resin was merged into Self-Modeling Resin. They also say that the monthly limit for synthesizing Self-Modeling Resin or Wishful Resin using Relic Remains remained at two for that version update. This is a Version 3.5 rule, not confirmation that the same limit remains unchanged in every later version. Read HoYoverse’s Version 3.5 update notes.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Choosing a Relic set
Compare the set bonus with the actions, character stats, or battle conditions it requires. A bonus that depends on a particular action or state may suit one character or team better than another; the official index provides the effects, but does not establish a universal best set or character-specific performance ranking. Use the official index to compare set effects.
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