Goblin Bushwhacker

Kicker {R} (You may pay an additional {R} as you cast this spell.)
When this creature enters, if it was kicked, creatures you control get +1/+0 and gain haste until end of turn.

Skoa, Embermage

When Skoa enters, it deals 4 damage to any target.
Grandeur — Discard another card named Skoa, Embermage, Sacrifice two Mountains: Skoa deals 4 damage to any target.

Daggersail Aeronaut

During your turn, this creature has flying.

Flamewave Invoker

{7}{R}: This creature deals 5 damage to target player or planeswalker.

Goblin Caves

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

Boggart Brute

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

Goblin Racketeer

Whenever this creature attacks, you may goad target creature defending player controls. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Battle-Rattle Shaman

At the beginning of combat on your turn, you may have target creature get +2/+0 until end of turn.

Mogg Fanatic

Sacrifice this creature: It deals 1 damage to any target.

Mountain

Goblin Shrine

Enchant land
As long as enchanted land is a basic Mountain, Goblin creatures get +1/+0.
When this Aura leaves the battlefield, it deals 1 damage to each Goblin creature.

Tuktuk Grunts

Haste
Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature.

Goblin Roughrider

Skirk Drill Sergeant

Whenever this creature or another Goblin dies, you may pay {2}{R}. If you do, reveal the top card of your library. If it's a Goblin permanent card, put it onto the battlefield. Otherwise, put it into your graveyard.

Reckless Lackey

First strike, haste
{2}{R}, Sacrifice this creature: Draw a card and create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Goblin Chirurgeon

Sacrifice a Goblin: Regenerate target creature.

Caterwauling Boggart

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

Goblin Grenade

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

Goblin Battle Jester

Whenever you cast a red spell, target creature can't block this turn.

Goblin Replica

{3}{R}, Sacrifice this creature: Destroy target artifact.

Goblin Researcher

When this creature enters, exile the top card of your library. During any turn you attacked with this creature, you may play that card.

Swarming Goblins

When this creature enters, roll a d20.
1—9 | Create a 1/1 red Goblin creature token.
10—19 | Create two of those tokens.
20 | Create three of those tokens.

Goblin Matron

When this creature enters, you may search your library for a Goblin card, reveal that card, put it into your hand, then shuffle.

Goblin Assault Team

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