Eve, Mother of All

Eve enters the battlefield with a +1/+1 counter on
it for each creature type among creatures you
control.
Whenever Eve attacks or blocks, you may pay {w}{g}. If you do, create a token that's a copy of
another target creature you control.
{2}{w}{g}, {t}: You may put a creature card from
your hand onto the battlefield. If you do, create a
1/1 green Snake creature token with deathtouch.