New version rubium 1.21.4 neoforge.jar is a release file of the Minecraft mod Rubium for NeoForge, made for Minecraft 1.21.4. It was published on September 25, 2025 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the Rubium mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
