We kinda already have build battle as an event that happens on Saturday and then the next Saturday is karaoke and then continuing with the trend. It happens in creative and you just do /warp build battle or /warp buildbattle I'm not for certain. This works completely well as I do like your idea of making a gametype for it as we have lots of great builders on the network. I'm just stating there is already an event of build battle but I like this idea as like I said up above. The only problem though is lots of other networks have this game and we want to be creative so if there is a way that you can think of making it more creative that would be cool.