Nosraht, the Blue

When Nosraht, the Blue enters the battlefield,
search your library for an instant, sorcery,
artifact or enchantment card and put it into
your graveyard.
{u}{b}: Target instant, sorcery, artifact or
enchantment card in your graveyard gains
escape until end of turn. The escape cost is
equal to the card’s mana cost plus exile three
other cards from your graveyard.