Goblin Instigator

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

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.

Attacking creatures you control get +1/+0.

Create a number of 1/1 red Goblin creature tokens equal to two plus the number of cards named Goblin Gathering in your graveyard.

First strike
When Goblin Chainwhirler enters, it deals 1 damage to each opponent and each creature and planeswalker they control.

{T}: Target creature gains haste until end of turn. (It can attack and {T} this turn.)

Haste
When Goblin Assault Team dies, put a +1/+1 counter on target creature you control.

Goblin spells you cast cost {1} less to cast.
Goblins you control have haste.

Create four 1/1 red Goblin creature tokens.

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

Other Goblins you control get +1/+1.
Sacrifice a Goblin: Destroy target artifact.

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

Haste (This creature can attack and {T} as soon as it comes under your control.)

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