The First Necromancer

The First Necromancer costs {x} less to cast for
each creature card in your graveyard.
{t}, {p/b}{p/b}{p/b}: Exile target creature from your
graveyard. Create a copy of it except the copy is a 2/2 black zombie in addition to it's other types.
If The First Necromancer would die, instead
exile it and create a 2/2 black zombie token that
is a copy of it except it doesn't have this
ability.