The One Who Weeps

When The One Who Weeps enters the battlefield,
you may sacrifice a creature. If you do, target
opponent must sacrifice two creatures.
Menace
Payback (Whenever another creature is sacrificed,
put a +1/+1 counter on this creature and gain 1 life)
Whenever The One Who Weeps is blocked by
three or more creatures, target opponent
sacrifices a creature.