If you run more than one Discord server, you can link them into a group so members build one level
and rank across the whole set, not just a single server. It layers on top of what they already earn
locally: their own server's level keeps working exactly as before, and the group adds a combined
ladder alongside it. See it with /level rank, scope set to Server group, and post a
self-updating group leaderboard the same way you'd post a server or global one. Level rewards, the
automatic roles members get at a level, can key off the group's level too.
Linking servers is mutual by design. Every server in the group lists the same servers, including itself, by server ID. The group only turns on once every server on that list has listed every other one back, so no server can attach itself to a group without the rest agreeing. One server takes the lead and sets the group's overall pace, and a live check in Configure shows exactly which servers still haven't reciprocated. If a group ever stops being mutual, its leaderboard quietly disappears until it's active again. A group can hold up to 50 servers.
Off by default. (Configure → Leveling & XP.)