Where do you go to learn the Things Man Was Not Meant To Know ?Good old IOU ! You must pay " tuition"as long as you control IOU. At the end of each turn, you must discard one Plot or Group from your hand or the top of your deck, or discard IOU and return its puppets to your hand. But IOU, and its master, and its puppets, are all completely immune to Disasters and to Straight and Government groups. And don't ask what the O stands for.