update1 is a release file of the Minecraft mod Katana Of Power for Forge, made for Minecraft 1.16.5. It was published on March 4, 2022 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the Katana Of Power mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.