I read an old thread and just thought of this. Might not work in ZS but mayhaps in the games where you have battle drops. How about a token that dropped that you could trade in for something. You'd get it for an attack or maybe a fight kill. It would work about the same as the golden tickets in Charlie and the chocolate factory. You kill something and theres a tiny, teeny chance you'd get the golden token/drop. This could be made into an event where one player had it and everyone else attacked eachother to look for it. It could be once per hour, it could be permanent. Only the imagination is the limit You already implemented the rebuy option for items -> UN credits so it might not even be hard to implement. That golden token could be changed for credits (or something else) in the store (or wherever you can get items sold, i'm not that big yet so i haven't seen it.)