Headmaster

When Headmaster enters look at the top 3
cards of your library. You may reveal an
instant or sorcery card from among them and
put it into you hand. Put the rest on the
bottom of your library in a random order.

"If he acts up one more time, I'll have him sent to
reform school ... by which I mean the coal mines.
Are we clear?"
— The Headmaster to Sokka, Katara, and Aang.