Goblin Caves

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

Goblin War Drums

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

{T}: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

Sacrifice a Goblin: Regenerate target creature.

Creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Create three 1/1 red Goblin creature tokens.

Goblin War Strike deals damage to target player or planeswalker equal to the number of Goblins you control.