Requirements for each clan: * 1 clanmate with Rated Clan Wars Leader permission * 10-500 clanmates inside the Clan Camp holding RCW badges. To start a match, your leader uses his or her RCW badge on an opposing leader to issue the challenge. If the challenge is accepted, both clans must log their Clan Battlemaster into the world. The Clan Battlemaster oversees official clan matches for your clan. Because he can only log in to one world at a time, you cannot play matches on different worlds at the same time.