Honkai Star Rail version 2.3 will release one of the most anticipated characters in the history of the game, Fire Destruction DPS — Firefly/Sam. She is an extremely strong DPS character, and her kit follows the new Break Effect and Super Break Effect meta. If you're planning to pull her, which you should be, you'll need to use up her materials before version 2.3 is released. Here is a complete farming guide on Firefly materials in Honkai Star Rail.

All Firefly Ascension Materials (Character Level Up Materials): Materials Quantity Credit308,000 Thoughts15 Fragment of Impression15 Raging Heart 65 Shards of Desires15Firefly Ascension Materials

All Firefly Track Materials (Tracks Level-up Materials): Material Amount Credit3 Million Borisin Teeth18 Disintegrating Thoughts41 Lupitoxin Saw Teeth69 Fragment of Impression56 Moon Madness Fang139 Shards of Desires58 Lost Echo of the Shared Wish12 Tracks of Destiny8Trace

Firefly/Sam's materials can be easily farmed in Penacony, with most of them available in the current version. You just need to wait for version 2.3 to produce her Echo of War material. Here is a complete farming guide for her ascension and trail materials.