Forest

Durkwood Boars

Birds of Paradise

Killer Bees

Flying
{G}: Killer Bees gets +1/+1 until end of turn.

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature gets +0/+2 and has reach. (It can block creatures with flying.)

Giant Growth

Target creature gets +3/+3 until end of turn.

Giant Spider

Reach (This creature can block creatures with flying.)

Aspect of Wolf

Enchant creature
Enchanted creature gets +X/+Y, where X is half the number of Forests you control, rounded down, and Y is half the number of Forests you control, rounded up.

Stream of Life

Aswan Jaguar

When Aswan Jaguar comes into play, choose a random creature type from those in target opponent's deck.
{G}{G}, {T}: Bury target creature of the chosen type.

Untamed Wilds

Search your library for a basic land card, put that card onto the battlefield, then shuffle.

Nafs Asp

Whenever Nafs Asp deals damage to a player, that player loses 1 life at the beginning of their next draw step unless they pay {1} before that draw step.

Grizzly Bears

Timber Wolves

Banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)