Goblin War Drums

Creatures you control have menace. (They can't be blocked except by two or more creatures.)

Flashfires

Goblin Grenade

As an additional cost to cast this spell, sacrifice a Goblin.
Goblin Grenade deals 5 damage to any target.

Fire Elemental

Wall of Earth

Wall of Stone

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.

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.

Goblin Digging Team

{T}, Sacrifice Goblin Digging Team: Destroy target Wall.

Goblin King

Other Goblins get +1/+1 and have mountainwalk.

Goblin Balloon Brigade

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

Stone Rain

Goblin Warrens

{2}{R}, Sacrifice two Goblins: Create three 1/1 red Goblin creature tokens.

Shatter

Giant Strength

Enchant creature
Enchanted creature gets +2/+2.

Goblin Caves

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

Red Elemental Blast

Choose one —
• Counter target blue spell.
• Destroy target blue permanent.

Earth Elemental

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Goblin Hero

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.