Phantom Universe is a guild that I started a long, long time ago. For all that time it's just been a guild of my brothers and I, and we never even used the guild hall or any of the other guild benefits. But now we think it's time to make it more of a guild than it is now. We are recruiting anyone who would be willing to pay even a slight bit of upkeep every now and then. That's really the only thing you have to have to join, just the willingness to pay some upkeep. We aren't a big guild yet but once we have some recruits we can get the guild up and running and the guild hall much bigger than it currently is.

If you're interested, contact one of these Spiral Knights users and simply ask for an invite:
Tarmoth
Adventist
Bellefleur