Winding Woods

({t}: Add {g}.)
When Winding Woods enters the battlefield, you may sacrifice a creature. When you do, put a +1/+1 counter on each creature you control and draw a card.
Whenever a creature enters the battlefield under your control, you may discard a card. If you do, draw a card.
{2}{g}{g}: Create a 2/2 green Elemental creature token with trample.