What's new?
In Minecraft 1.21 registering custom entities has become even more complex, with Spigot and PaperMC now requiring a slightly different approach. While the previous versions already worked on Paper, they could lead to multiple warnings being send to the console on Spigot. This update works on both versions, and dragons should still be persistent (i.e. stay alive across restarts/chunk unloading). As this plugin is incredibly difficult to debug, please let me know through the discussion thread or private message if you encounter any issues!

How to update?
Download the jar file from the top of this page and put it in your plugins folder. Make sure to remove the previous version of this plugin. Now restart (not reload) your server and you are done!