Shin, The Soulfeeder

Flying, deathtouch, haste
As an additional cost to cast Shin, exile any
number of creatures from any graveyard. Shin
enters the battlefield with a +1/+1 counter for
each creature exiled this way.
Reveal Shin from your hand: Each player mills
five cards. Activate this ability as a sorcery and
only if Shin has not been revealed.