Thieving Cloaker

Flying
When Thieving Cloaker attacks, stash a card
facedown from the top of your library under
Thieving Cloaker.
Thieving Cloaker has +1/+1 for each card
stashed under it.
When Thieving Cloaker dies, look at the cards
stashed under Thieving Cloaker. Put one into your hand, shuffle the rest into your library.