BungeeCord plugin to require that players don't spend hours grinding by themselves.
Or as I call it: singleplayer on a server.
This plugin must be configured with a main server and a lobby server. When there is only one player online,
they get moved to the lobby server. I recommend a lobby server on creative mode with no rules.
When a second player joins, they both get moved to the main server. And when one leaves, the remaining player gets moved back to lobby. Pretty simple concept.
To-do: make plugin properties configurable