Gravekeeper's Trap

Trap
Foretell {1}{w}
Discard a card: Reveal a Zombie or Rock type
creature from your library and add it to your hand,
then shuffle.(Activate only once on your turns.)
At the beginning of each opponents up-keep you
may declare a card name. That player reveals the
top card of their library, and if it is the declared
card put it into their graveyard.