Necro-Dragon's Thrall

Flying, Haste, Menace.
Whenever a Dragon or Zombie comes into play,
you may return Necro-Dragon's Thrall from
your graveyard to the battlefield.
Whenever Necro-Dragon's Thrall deals damage
to a player, you may create a black 2/2 Zombie creature token for each creature card in that
players graveyard.