Mage of the Isles

When Mage of the Isles enters the battlefield, name a creature type. Reveal the top cards of your library until you find the named card. Put that card into your hand and the rest into the bottom of your library.
{2}{u}{g}: Draw two cards and add {u}{g} to your mana pool. Then, if Terrors of the Isles is on the battlefield, exile Mage of the Isles and Terrors of the Isles and return Nightmare of the Isles onto the battlefield.