Wildwood Druid

Exploration {3}{g} ({3}{g}, {t}: Reveal the top card of your library. If it's a land, put a +1/+1 counter on this creature.)
Whenever a land enters the battlefield under your control, if it is the first land that entered the battlefield under your control this turn, proliferate
"Some claim to know nature's secrets. But those are the ones who know least of all."