Snake Goddess

Defender, Deathtouch, Reach
At the beginning of each upkeep, create a 1/1
Black Snake token with Deathtouch.
{t}: Put the top X cards of your library into your graveyard, where X is the number of Snakes you control.
{b}{b}{g}, {t}, Exert Snake Goddess: Put a -1/-1
counter on each non-Snake creature.