Zethra, Mage of the Portal

When Zethra, Mage of the Portal enters the battlefield under your control, look at the top
three cards of your library. You may reveal a
creature from among them and put it into your
hand. Put the rest at the bottom of your library
in a random order.
{2}{u}{u}, {t}: Exile target creature you control,
then return it to the battlefield tapped under
your control.