![Image](http://i.imgur.com/NjjSRJ7.jpg)
It must be used in the 5 minute window at the start of tribal council when I ask if the person who won immunity would like to give it up.
It can be used at any time between now and the final 5.
You can give it away but must post so here first. You can also play it on someone else at the start of tribal council.
Good luck!