Astrid, the Verdant Weave

+1: Populate. If you control 3 or more creature tokens, draw a card.
-2: Create two 1/1 green Saproling creature tokens. If you control seven or more creatures, you gain 4 life.
-7: You get an emblem with "Whenever you cast a creature spell, create a green 3/3 Beast creature token with trample."