Hahaha drunk! Ok so once there are only 10 people left, you merge and face a new tribe. So like say that there were 2 tribes.
Tribe1:
guy a
guy b
guy c
guy d
guy e
guy f
guy g
guy h
guy i
guy j
Tribe 2:
guy k
guy l
guy m
guy n
guy o
guy p
guy q
guy r
guy s
guy t
Then they do challenges. Each tribe mate does a challenge and then after 12 hours, all the scores are tallied up and then the tribe with the lowest overall score loses. However, the losing tribe also plays another challenge for individual immunity. If you get the highest score in that, you win individual immunity and all votes cast toward you are invalidated. The person with the most votes is out. This continues until it is down to 10 people. Then they merge and face a other tribe is either assembled by people enrolling or another tribe merging. Then it keeps going on and on until you are voted out.