elementalmastery-1.3.1.jar is a release file of the Minecraft mod Elemental Mastery for Forge, made for Minecraft 1.12.2. It was published on August 25, 2020 and is 0.5 MB in size. For the full description, screenshots and every other version, visit the Elemental Mastery mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.