Ghalta, Primal Hunger

This spell costs {X} less to cast, where X is the total power of creatures you control.
Trample

Colossal Dreadmaw

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Llanowar Elves

Ravenous Chupacabra

When Ravenous Chupacabra enters, destroy target creature an opponent controls.

Walking Corpse

Ursine Champion

{5}{G}: Ursine Champion gets +3/+3 and becomes a Bear Berserker until end of turn. Activate only once each turn.

Vampire Sovereign

Flying
When Vampire Sovereign enters, target opponent loses 3 life and you gain 3 life.

Prodigious Growth

Enchant creature
Enchanted creature gets +7/+7 and has trample.

Gravewaker

Flying (This creature can't be blocked except by creatures with flying or reach.)
{5}{B}{B}: Return target creature card from your graveyard to the battlefield tapped.

Vigilant Baloth

Vigilance (Attacking doesn't cause this creature to tap.)

Impale

Grazing Whiptail

Hitchclaw Recluse

Verdant Sun's Avatar

Whenever Verdant Sun's Avatar or another creature you control enters, you gain life equal to that creature's toughness.

Bristling Boar

Bristling Boar can't be blocked by more than one creature.

Centaur Courser

Greenwood Sentinel

Foul Orchard

Foul Orchard enters tapped.
{T}: Add {B} or {G}.

Jungle Creeper

{3}{B}{G}: Return Jungle Creeper from your graveyard to your hand.

Pelakka Wurm

Trample
When Pelakka Wurm enters, you gain 7 life.
When Pelakka Wurm dies, draw a card.

Forest

Reclamation Sage

When Reclamation Sage enters, you may destroy target artifact or enchantment.

Swamp

Titanic Growth

Target creature gets +4/+4 until end of turn.

Moment of Craving

Target creature gets -2/-2 until end of turn. You gain 2 life.

Declare Dominance

Target creature gets +3/+3 until end of turn. All creatures able to block it this turn do so.