Ow, come on... the new clan will be a new clan, that's all...
The bonus Protection: Damage and Power is cool, but it would be too powerful. It would make this clan a destroyer of All Stars and pussycat and of all cards amongst the game that reduces damage or power... impossibile!!
I head that the bonus will be a "strange and totally new" thing, so lets wait!!
We can't really help not bringing up the wrestling aspect considering that the name of the comic includes "Lucha libre" and the mysterious fighter used some wrestling move on Orenichi on page one. Whatever it is, it probably has something to do with it one way or another. If it's a new clan, it probably looks like such of a wrestling-federation-thingamajig on the outside; if it's a new Leader, it could be someone kicked out from W.A.R..
Not saying any of this is true, those are just the first ways I can think of to tie the small clue together.
The Urban Rivals team is made by lovers of all kind of Collectibles Cards Games and Trading Cards Games like: Magic the Gathering, Dominion, Vampire, Yu-Gi-Oh!, Pokemon, Wakfu TCG, Assassin Creed Recollection, Shadow Era, Kard Kombat and Might & Magic Duel of Champions.