Within the entire population of the human race now lies someone with the power to make people believe anything. One person can make anyone act differently, making it the new normal for them, or for the rest of the human race. Making someone believe they are something or someone of their choosing...
An animal...
A bimbo...
Anything...
Reality will alter in their hands as they can control the minds of the human race. They will become the playthings of this new holder of this divine power. They can do anything to these people, anything to their will. No force can stop them, only themselves, and who knows if they'll ever want to stop. No one can stop them, or they might end up as their new pet.
Now...