Burning-Tree Emissary

Giant Growth

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

Forest

Kird Ape

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

Rancor

Enchant creature
Enchanted creature gets +2/+0 and has trample.
When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.

Dwarven Mine

({T}: Add {R}.)
This land enters tapped unless you control three or more other Mountains.
When this land enters untapped, create a 1/1 red Dwarf creature token.

Mountain

Rip-Clan Crasher

Gruul Turf

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {R}{G}.

Llanowar Stalker

Whenever another creature you control enters, this creature gets +1/+0 until end of turn.

Viashino Branchrider

Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.)
Haste
If this creature was kicked, it enters with two +1/+1 counters on it.
{2}{R}: This creature gets +2/+0 until end of turn.

Experiment One

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Remove two +1/+1 counters from this creature: Regenerate it. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Psychotic Fury

Target multicolored creature gains double strike until end of turn.
Draw a card.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Scab-Clan Mauler

Bloodthirst 2 (If an opponent was dealt damage this turn, this creature enters with two +1/+1 counters on it.)
Trample