This is a map that has 5 Build battle arenas inside.
You need 3 players, a judge, and 2 builders

Judge: They tell the builders when time is up, They decide what build is better and they pick what the builders build!
Builders: Its pretty obvious.... They build! They have a set time (By judge) to build something! and when time is up, one of them burns the middle wooden wall, revealing the other players build.

After that, the judge decides, and then move on to the next round.