Lydor, Recruited Prophet

Whenever an opponent casts a creature spell with converted mana cost 4 or greater, look at the top
two cards of your library. Put one of them into
your hand and the other into your graveyard.
{u}, {t}, Exile a card with converted mana cost 4 or greater from your hand: Counter target creature
spell if it has the same converted mana cost as the exiled card.