1.0.4-mc1.21.9 is a release file of the Minecraft mod The Copperier Age: Copperier Copper for Fabric, Quilt, made for Minecraft 1.21.9. It was published on October 9, 2025 and is 4 MB in size. For the full description, screenshots and every other version, visit the The Copperier Age: Copperier Copper mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
