You Happen upon a Swamp

Choose one —
Rummage in the waters - You may discard a card.
If you do, draw three cards.
Explore the ruins - Look at the top three cards of
your library. Put any number of them into your graveyard and the rest into your hand. For each creature put into your graveyard this turn, create
a 2/2 black Zombie creature token.
"Tread carefully: We are not alone in these waters."