cspirit-1.0.0+mc.1.16.4.jar is a release file of the Minecraft mod Christmas Spirit: Modern for Fabric, made for Minecraft 1.16.5, 1.16.4. It was published on December 21, 2020 and is 7 MB in size. For the full description, screenshots and every other version, visit the Christmas Spirit: Modern mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
