Nissa, Spirit of the Vale

+1: Until your next turn, Nissa becomes a X/X spirit creature with flying and vigilance that’s still a planeswalker where X is the number of forests
-1: Search your library for a basic forest card and put it onto the battlefield tapped. Then shuffle your library.
-5: Until end of turn, creatures you control gain +X/+X, flying and vigilance where X is the number of forests you control.