1.3fleshlab.jar is a release file of the Minecraft mod Labyrinth by CX for Forge, made for Minecraft 1.20.1. It was published on November 6, 2023 and is 19.7 MB in size. For the full description, screenshots and every other version, visit the Labyrinth by CX mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.