Corroded Fossil
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| Dropped by | ||
|---|---|---|
| Entity | Quantity | Rate |
| Flak Crab Orthocera Sulphurous Skater Trilobite | 1-3 | 33.33% (Tier 2) 6.67% (Tier 3) |
| Anthozoan Crab Belching Coral | 1 | 6.67% |
| Acidwood Tree | 1-2 | 2.76% (Post-T2 |
Corroded Fossils are Hardmode crafting materials that are dropped by various enemies in the Acid Rain event after the Aquatic Scourge has been defeated, as well as some post-Aquatic Scourge Sulphurous Sea enemies. They are used to craft several weapons themed around the Acid Rain.
Crafting
Used in
History
These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
- 2.0.3.001: Can now be used to place ambient objects with the Rubblemaker.
- 1.4.4.001: Introduced.

