Weekly clan jacketpot

Each week, say like saturday night. All the platinum won by players not in a clan goes into a "pot". An area somewhere near crossroads becomes a giant clan battle, at least 2 clans must appear to win it. Last one with clan only members in the area gets it. Maybe cant reenter after death? Not sure how itd work.. perhaps a fence goes up at an exact time or something..

The Combat Arena has the capability to limit to clans only.
It could be used/modified for a clans only reward system.