Mountain

Giant Growth

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

Scryb Sprites

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Elvish Hunter

{1}{G}, {T}: Target creature doesn't untap during its controller's next untap step.

Blood Lust

If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.

Llanowar Elves

Elvish Archers

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.

Craw Wurm

Forest

Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Kird Ape

This creature gets +1/+2 as long as you control a Forest.

Dragon Whelp

Flying
{R}: This creature gets +1/+0 until end of turn. If this ability has been activated four or more times this turn, sacrifice this creature at the beginning of the next end step.