Quest of Hollow Graves

(As you set up the game, you may reveal this
card from your sideboard, putting it into
your command zone.)
At the beginning of your end step, if a
creature was put into your graveyard from
anywhere this turn, and a creature was put
onto the battlefield from your graveyard,
you may draw a reward card. If you do, put
Quest of Hollow Graves into your sideboard.