lbm-1.0.jar is a release file of the Minecraft mod Lightweight Blood Mechanics, made for Minecraft 1.12.2. It was published on August 8, 2019 and is 0 MB in size. For the full description, screenshots and every other version, visit the Lightweight Blood Mechanics mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
