Kuldotha Rebirth

As an additional cost to cast this spell, sacrifice an artifact.
Create three 1/1 red Goblin creature tokens.

Goblin Tomb Raider

As long as you control an artifact, Goblin Tomb Raider gets +1/+0 and has haste.

Lotus Petal

{T}, Sacrifice Lotus Petal: Add one mana of any color.

Burning-Tree Emissary

When Burning-Tree Emissary enters, add {R}{G}.

Experimental Synthesizer

When Experimental Synthesizer enters or leaves the battlefield, exile the top card of your library. Until end of turn, you may play that card.
{2}{R}, Sacrifice Experimental Synthesizer: Create a 2/2 white Samurai creature token with vigilance. Activate only as a sorcery.

Goblin Bushwhacker

Kicker {R} (You may pay an additional {R} as you cast this spell.)
When this creature enters, if it was kicked, creatures you control get +1/+0 and gain haste until end of turn.

Rancor

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

Bakery Raid

Create a Food token. (Then exile this card. You may cast the creature later from exile.)

Hollow Scavenger

{1}, Sacrifice a Food: Hollow Scavenger gets +2/+2 until end of turn. Activate only once each turn.

Hollow Scavenger // Bakery Raid

Mutagenic Growth

({G/P} can be paid with either {G} or 2 life.)
Target creature gets +2/+2 until end of turn.

Highland Forest

({T}: Add {R} or {G}.)
Highland Forest enters tapped.

Mountain

Wooded Ridgeline

({T}: Add {R} or {G}.)
Wooded Ridgeline enters tapped.

Great Furnace

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Forest

Kird Ape

Kird Ape gets +1/+2 as long as you control a Forest.