Goblin Goliath

When this creature enters, create a number of 1/1 red Goblin creature tokens equal to the number of opponents you have.
{3}{R}, {T}: If a source you control would deal damage to an opponent this turn, it deals double that damage to that player instead.

Havoc Devils

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Shock

Demanding Dragon

Flying
When this creature enters, it deals 5 damage to target opponent unless that player sacrifices a creature of their choice.

Mountain

Goblin Motivator

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

Goblin Instigator

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

Trumpet Blast

Attacking creatures get +2/+0 until end of turn.

Guttersnipe

Whenever you cast an instant or sorcery spell, this creature deals 2 damage to each opponent.

Howling Golem

Whenever this creature attacks or blocks, each player draws a card.

Eager Construct

When this creature enters, each player may scry 1. (To scry 1, look at the top card of your library, then you may put that card on the bottom.)

Dragon Fodder

Create two 1/1 red Goblin creature tokens.

Bombard

Bombard deals 4 damage to target creature.

Captivating Crew

{3}{R}: Gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery.

Seismic Elemental

When this creature enters, creatures without flying can't block this turn.

Welder Automaton

{3}{R}: This creature deals 1 damage to each opponent.

Volley Veteran

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

Rolling Thunder

Rolling Thunder deals X damage divided as you choose among any number of targets.

Goblin Trashmaster

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

Act of Treason

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)

Tormenting Voice

As an additional cost to cast this spell, discard a card.
Draw two cards.

Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Siege-Gang Commander

When this creature enters, create three 1/1 red Goblin creature tokens.
{1}{R}, Sacrifice a Goblin: This creature deals 2 damage to any target.