Swamp Elder

Whenever a Swamp enters the battlefield, you
may put a -1/-1 counter on target creature you
don't control.
Whenever a Forest enters the battlefield, you
may put a 1/1 green Saproling token into play.
{b}{g}, {t}: Sacrifice a Saproling, put a +1/+1
counter on target creature you control.
"Respect your Swamp Elders."