My league is The Black Hand http://www.twilightheroes.com/leagues.php?league=26
. I named it after the group of Serbian nationalists who conspired, and successfully assassinated Archduke Franz Ferdinand sparking World War I. I primarily did it though because it's a cool name.
My league is open to anyone and my vault is filled with goodies. I am an active player in this game and I keep on killing the Orwhal, though I hope that I will eventually be doing it as a group. I will be willing to share my vault contents with members as long as they mail me in game and request an item.