Excavation Ghoul

Flying, ward {1}
At the beginning of your upkeep, pay {2} and sacrifice a creature.
Whenever a creature an opponent controls enters
a graveyard, you may pay {4}. Put that creature
onto the battlefield under your control unless
each opponent pays 3 life. When that creature
dies, exile it with Excavation Ghoul.
A previous archaeologist, she still tries to sell her
excavations to museums. Pity they don't accept
human flesh.