Jonah, Thane of Teens

Flash
When Jonah, Thane of Teens, enters the
battlefield, look at the top three cards of your
library. You may reveal a dragon creature card,
a Bolas planeswalker card, or an instant card
from among them and put it into your hand.
Put the rest on the bottom of your library
in a random order.
"Naaaaaaah...."