Face of the Gorgo

When Face of the Gorgo enters the battlefield,
each player sacrifices a creature.
Whenever you sacrifice a nontoken creature,
create a green 0/1 snake creature token with
snakepit.
{5}{b}{g}, exile Face of the Gorgo: Create a
legendary X/X creature named Gorgora with deathtouch and 'Gorgora's power and toughness
are equal to 1 plus the number of snakes and
nagas in your graveyard.'