Hello planet minecraft have been working for the last 2 weeks on this mob arena.You are able to choose your weapons and the mobs you fight. Using the testfor and scoreboard commands. this includes showing the health on the top of the player and how many mobs you have killed. once you have killed 100 mobs the arena fails to load. then you somehow end up in the end which you are give random items to destroy the dragon.
Very thanks to HYDRO205 and jjcooly1 for there help and tips.
hope you like the map and as always
For the better map try Mob Arena 2
http://www.planetminecraft.com/project/the-mob-arena-2/
Try the most Updated mob arena. Mob Arena 3
http://www.planetminecraft.com/project/mob-arena-3-beta-version/

minecraftmanadvanced out....