Both Old and New 1.1.jar is a release file of the Minecraft mod Both Old and New (Deep Dark and Alpha Content) for Forge, made for Minecraft 1.16.5. It was published on June 4, 2022 and is 1.7 MB in size. For the full description, screenshots and every other version, visit the Both Old and New (Deep Dark and Alpha Content) mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.