the second twist of this season is called the "Outlaster," and here is how it is going to work.
Living in Big Brother's Jungle, it is all about surviving. Surviving the competitions, surviving each other, and most importantly, surviving eviction.
That is why each week, the nominee who survived the previous eviction will be given a special power. If you survive eviction, you will be able to NULLIFY the vote of a voting Houseguest at the next eviction.
The Houseguest whose vote is nullified will have no idea that their vote did not count, and neither will the rest of the house. The only person who will know whose vote was null is the Outlaster.