Arachne Queen

Reach, menace
{b/g}, Sacrifice a creature: Create X 1/1 black and
green Spider creature tokens with Reach where X
is the sacrificed creature's converted mana cost.
Spider creatures you control have Wither.
Whenever you put one or more -1/-1 counters
on a creature, each opponent loses 1 life and
you gain 1 life.