sleeping sea-hydra

{4}{u}: reveal sleeping sea-hydra from your
hand: put it on top of your library.
awoken {4}{u} (you may reveal this card as you draw
it if it's the first card you have drawn this turn. if you
do, you may cast it for it's awoken cost)
whenever sleeping sea-hydra enters the battlefield, return target creature an opponent controls to
their owner's hand.