Raging Goblin

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

Raging Redcap

Double strike (This creature deals both first-strike and regular combat damage.)

Warren Instigator

Double strike
Whenever this creature deals damage to an opponent, you may put a Goblin creature card from your hand onto the battlefield.

Goblin Smuggler

Haste (This creature can attack and {T} as soon as it comes under your control.)
{T}: Another target creature with power 2 or less can't be blocked this turn.

Mardu Scout

Dash {1}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

Tarfire

Goblin Arsonist

When this creature dies, you may have it deal 1 damage to any target.

Goblin Shortcutter

When this creature enters, target creature can't block this turn.

Reckless One

Haste
Reckless One's power and toughness are each equal to the number of Goblins on the battlefield.