Goblin King

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

Goblin Warrens

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

Goblin Hero

Goblin Balloon Brigade

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

Wall of Stone

Shatter

Fire Elemental

Goblin Grenade

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

Wall of Earth

Goblin Caves

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

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.

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 War Drums

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

Earth Elemental

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Giant Strength

Enchant creature
Enchanted creature gets +2/+2.

Stone Rain

Red Elemental Blast

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

Flashfires

Mountain

Goblin Digging Team

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

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.