Bog Mischief

Menace, deathtouch
When Bog Mischief enters the battlefield,
target creature gets -3/-3 until end of turn.
Whenever a creature an opponent controls
dies and Bog Mischief is in your graveyard,
you may pay {b} and exile that creature. If you
do, return Bog Mischief from your graveyard
to your hand at the end of turn.