Festering Goblin

When Festering Goblin dies, target creature gets -1/-1 until end of turn.

Goblin Chirurgeon

Sacrifice a Goblin: Regenerate target creature.

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

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

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

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

Return target Goblin card from your graveyard to your hand.

{T}: Goblin Fireslinger deals 1 damage to target player or planeswalker.

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

Haste
Goblin spells and Rogue spells you cast cost {1} less to cast.

Add {R} for each Goblin on the battlefield.

{R}: Goblin Balloon Brigade gains flying until end of turn.