Lirael, the Remembrancer

At the beginning of your upkeep, you may exile
target creature card from your graveyard. If you
do, look at the top X cards of your library, where
X is the mana value of the exiled card. You may
reveal up to two instant and/or sorcery cards
from among them and put them into your hand.
Put the rest on the bottom of your library in a
random order.