Mountain

Goblin Goon

Goblin Goon can't attack unless you control more creatures than defending player.
Goblin Goon can't block unless you control more creatures than attacking player.

Beetleback Chief

When Beetleback Chief enters, create two 1/1 red Goblin creature tokens.

Shock

Goblin Arsonist

When Goblin Arsonist dies, you may have it deal 1 damage to any target.

Thriving Bluff

Thriving Bluff enters tapped. As it enters, choose a color other than red.
{T}: Add {R} or one mana of the chosen color.

Ornery Goblin

Whenever Ornery Goblin blocks or becomes blocked by a creature, Ornery Goblin deals 1 damage to that creature.

Goblin Shortcutter

When Goblin Shortcutter enters, target creature can't block this turn.

Boggart Brute

Menace (This creature can't be blocked except by two or more creatures.)

Volley Veteran

When Volley Veteran enters, it deals damage to target creature an opponent controls equal to the number of Goblins you control.

Goblin Commando

When Goblin Commando enters, it deals 2 damage to target creature.

Goblin Instigator

When Goblin Instigator enters, create a 1/1 red Goblin creature token.

Makeshift Munitions

{1}, Sacrifice an artifact or creature: Makeshift Munitions deals 1 damage to any target.

Goblin Chieftain

Haste (This creature can attack and {T} as soon as it comes under your control.)
Other Goblin creatures you control get +1/+1 and have haste.