Hello, I would like to share my spleef arena, located about 50 blocks East of protected spawn on smp5, here's a few screenshots of it, just to get you a look-around There ARE prizes, i'm just letting you know that this is mainly for fun but each time you win, you receive 1 diamond (which can add up when you spleef a lot)
to add-on I mainly built this for those people AFKing at the mob arena waiting around, with nothing to do