Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Naturalize

Mistcutter Hydra

This spell can't be countered.
Haste, protection from blue
This creature enters with X +1/+1 counters on it.

Giant Growth

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

Burning-Tree Emissary

Pyroclasm

Pyroclasm deals 2 damage to each creature.

Mountain

Brute Force

Fanatic of Xenagos

Trample
Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.)
When this creature enters, if tribute wasn't paid, it gets +1/+1 and gains haste until end of turn.

Boggart Ram-Gang

Haste
Wither (This deals damage to creatures in the form of -1/-1 counters.)

Forest

Boartusk Liege

Trample
Other red creatures you control get +1/+1.
Other green creatures you control get +1/+1.

Flinthoof Boar

This creature gets +1/+1 as long as you control a Mountain.
{R}: This creature gains haste until end of turn. (It can attack and {T} this turn.)