2 tribes of 20
Each tribe picks a chief.
The chief decides which 8 compete in the challenge.
The challenges are head to head 1v1. Everyone is given 2 choices compete or forfeit. If you compete and lose you get taken to the other tribe as prisoner. If you forfeit you get to go back to your tribe.
The winning tribe gets immunity.
The losers vote off one of their own.
Prisoners have to go to tc but its up to the leader whether they get to vote or not. They however can be voted out.
There is a merge at 20 and the current leaders split up the group into 2 tribes of 10.