The Bonus, well, the each card in the Clan would be from different clan bonus..
I mean, The Clan will not have a uniform bonus but have bonuses from different clans, like CoB but already set.
One card in the clan would have the Pussycat Bonus and the other will have Berzerk.. like you get four bonuses in one hand. It will be tricky to use but will be fun IMO..
the story for the clan could go like, They are the rejects that even the Freaks didn't want them so united under one roof they form their own clan and stole the bonus of the clans they wanted to join... IDK..