Mob Arena

So I know that Meepcraft has a "Mob Arena" where you can go to if you want to kill some random mobs and stuff but on another server I like to play on, the server has this cool plugin which has an arena where before you play, you can pick a class and than say that you are ready to fight. After all are ready to fight, you spawn and waves of enemies come at you. after defeating a certain amount of rounds, you receive a prize. after a few more, you receive another prize and so on. On the server, every 10th round is a boss round and a customized enemy appears. The first boss in that servers arena was a zombie. The zombie had a ton of health and effects it would use in order, such as shooting arrows, throwing people back and paralyzing players. I believe that this plugin would create fun for a large range of players who like fighting. Also the Web address is: http://dev.bukkit.org/bukkit-plugins/mobarena/ If you want to take a look and please leave feedback.