Scab-Clan Mauler

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

Llanowar Stalker

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

Burning-Tree Emissary

Giant Growth

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

Mountain

Kird Ape

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

Gruul Turf

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

Forest

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.

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.

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.

Rip-Clan Crasher

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.

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.)