Scryb Sprites

Giant Growth

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

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.

Kird Ape

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

Forest

Elvish Hunter

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

Llanowar Elves

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.

Craw Wurm

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Shivan Dragon

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

Mountain

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.