morebossesmobs-4.4.0-neoforge-1.21.1.jar is a release file of the Minecraft mod The Old LMB for NeoForge, made for Minecraft 1.21.1. It was published on February 23, 2025 and is 2.4 MB in size. For the full description, screenshots and every other version, visit the The Old LMB mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.