The First Update! is a release file of the Minecraft mod Magic Material, made for Minecraft 1.12.2. It was published on March 11, 2018 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the Magic Material mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
