Denied for now, we might reconsider this as event in the future if we think it fits. It's not easy to get the clans & its members to online at the same time & to involve in a fight without causing tension between the fighters/clans. Moreover, the difference between timezone, available admins..etc, we need to take count of that too before making an event. Anyway, you can freely challenge a clan or open a fight on your own & use the server as fight base as said by Aaron. But we are not part of it, so the current server's rules must be obeyed.