Crystal Optimizer-1.21.X-1.0.3.jar is a release file of the Minecraft mod End Crystal Optimizer for Fabric, made for Minecraft 1.21, 1.20.5, 1.21.4, 1.20.6, 1.21.1, 1.21.3, 1.21.2. It was published on January 31, 2026 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the End Crystal Optimizer mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
