Nadalia Vizier of Poisons

Afflict 2 (when this creature is blocked it does
2 damage to defending player)
When Nadalia Vizier of Poisons is blocked,
and the creature has a -1/-1 counter on it,
create two 1/1 green/black snake tokens with
Deathtouch
{b}{g}, put a -1/-1 counter on target creature
{w}{b}, exile target creature with a -1/-1
counter on it