Green creatures you control get +1/+1.
Whenever a green creature you control enters, scry 1.
Illustrated by Franz Vohwinkel · Jumpstart: Historic Horizons · #649
There are no rulings for Sylvan Anthem.
Whenever a creature you control enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Whenever you cast a spell that targets a creature you control, draw a card.
Whenever a creature you control with power 3 or greater enters, draw a card.
Whenever a nontoken creature you control with power 4 or greater enters, populate. (Create a token that's a copy of a creature token you control.)
When this creature enters, put a +1/+1 counter on target creature you control.
Whenever a creature you control with power 5 or greater enters, you may put two +1/+1 counters on it.
When this creature enters, you get (three energy counters).