You find a box outside your door, and take it inside. Opening the box, it seems to be some kind of smartwatch. You turn it on, and see a holographic keypad, and a voice that says: [This is the Food Chainer. It allows you to change the dominant species of a planet, retroactively. This changes the course of evolution itself. You will also be automatically assigned and turned into the new dominant species. Please make a selection!]