Soulreaper

Flying, Lifelink
If another card would be put into an opponent's
graveyard from anywhere other than exile, exile
it instead.
At the beginning of each player's upkeep, they
may put a target creature card from exile into
their graveyard. If they do, they lose life equal
to that creature's converted mana cost.
Soulreaper's power and toughness are equal to
the number of creature cards in exile.