Adventure Map World Reset

Hello thank you for looking at this this post, I own a small Christian Towny survival server and wanted to open another server with 8 slots for a pvp adventure map I made. I was wonderring if anyone knew of a plugin that would reset the world when there is only one person left without me manually having to do it. I would also prefer to be able to set spawns for like the first player, seconds player, ect. I would also prefer a team option where there could be 4 teams, Maybe also a option for a tournament where multiple games would go on at once and them when they were over put all the winners in a final round. Thank you for checking this out.

p.s. I also would like an option where once a player dies they can spectate(be invicible, flwying, not breaking any blocks, and not receive damage.) and maybe not be able to talk to in game players.

p.s. I would also like a world border.