Forest

Scarwood Goblins

Orgg

Trample
Orgg can't attack if defending player controls an untapped creature with power 3 or greater.
Orgg can't block creatures with power 3 or greater.

Black Lotus

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

Goblin Balloon Brigade

{R}: Goblin Balloon Brigade gains flying until end of turn.

Giant Spider

Reach (This creature can block creatures with flying.)

Crumble

Destroy target artifact. It can't be regenerated. That artifact's controller gains life equal to its mana value.

Hurricane

Hurricane deals X damage to each creature with flying and each player.

Mountain

Su-Chi

Elkin Bottle

{3}, {T}: Exile the top card of your library. Until the beginning of your next upkeep, you may play that card.

Adun Oakenshield

{B}{R}{G}, {T}: Return target creature card from your graveyard to your hand.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Goblin Hero

Tranquility

Birds of Paradise

Stream of Life

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

Vaevictis Asmadi

Flying
At the beginning of your upkeep, sacrifice Vaevictis Asmadi unless you pay {B}{R}{G}.
{B}: Vaevictis Asmadi gets +1/+0 until end of turn.
{R}: Vaevictis Asmadi gets +1/+0 until end of turn.
{G}: Vaevictis Asmadi gets +1/+0 until end of turn.

Goblin Caves

Enchant land
As long as enchanted land is a basic Mountain, Goblin creatures get +0/+2.

Goblins of the Flarg

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)
When you control a Dwarf, sacrifice Goblins of the Flarg.

Shatter

Goblin Shrine

Enchant land
As long as enchanted land is a basic Mountain, Goblin creatures get +1/+0.
When Goblin Shrine leaves the battlefield, it deals 1 damage to each Goblin creature.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Conch Horn

{1}, {T}, Sacrifice Conch Horn: Draw two cards, then put a card from your hand on top of your library.