"Thank you." She clasps her hands, still beaming. "While I have many names, the one that all of you shall know me by for the following year is Mesmerra--Dean Mesmerra, for I am the founder, administrator and absolute ruler of this school." Pause for effect. "I am a goddess of mind control. That's not bragging! I am not merely deific in skill, but a literal deity who draws power from every instance of mind control in every single world I touch. And the number of those is always growing." She tosses her hair a little, not quite smug, merely supernally self-assured.
"Welcome to Mind Control University. Ours is an intensive program, and by the end of the year every single one of you will have the power to bring nations to heel with nothing but your own will and a box of scraps. Of course, this is a competitive program as well, in more ways than one--some of you will no doubt be Emperors and Empresses in your own right before the year is out, while others...may be pets, or toys, to the others. Remember," she winks, "do unto others before they do unto you! But there are, of course, limits," she says, turning serious. "Rule number one is that you are not permitted to sabotage your classmates' studies, be they your rivals or pets. Subtlety is key--you are here to learn cunning and finesse almost as much as raw power. An attempt to enslave one of your classmates discovered before the attempt is complete will result in your would-be pet being freed and a penalty laid on you, and no, I won't tell you what it is. There are so many possibilities, and even I don't know beforehand which one is going to be most appropriate." Pause. Headtilt. "Also, the library, classrooms, and cafeteria food are absolutely off-limits. Attempting to enslave one of your teachers isn't against the rules, and in fact will result in instant graduation magna cum laude if successful, but you will not be successful, and will no longer be off-limits to them. Don't do it."
She smirks. "Any questions?"