Plugin.jar is a beta file of the Minecraft plugin Adventure of the zoologist, made for Minecraft 1.16. It was published on July 4, 2021 and is 0.1 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Adventure of the zoologist plugin page.
How to install: Put the .jar into the plugins folder of your Paper, Spigot or Bukkit server and restart the server.