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.

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.)

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Fanatical Firebrand

Haste (This creature can attack and {T} as soon as it comes under your control.)
{T}, Sacrifice this creature: It deals 1 damage to any target.

Forked Bolt

Forked Bolt deals 2 damage divided as you choose among one or two targets.

Flaring Pain

Damage can't be prevented this turn.
Flashback {R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Sparksmith

{T}: Sparksmith deals X damage to target creature and X damage to you, where X is the number of Goblins on the battlefield.

Forgotten Cave

Forgotten Cave enters tapped.
{T}: Add {R}.
Cycling {R} ({R}, Discard this card: Draw a card.)

Goblin Grenade

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

Goblin Sledder

Sacrifice a Goblin: Target creature gets +1/+1 until end of turn.

Akki Scrapchomper

{1}{R}, {T}, Sacrifice an artifact or land: Draw a card.

Mountain

Mogg War Marshal

Echo {1}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Mogg War Marshal enters or dies, create a 1/1 red Goblin creature token.

Goblin Cohort

Goblin Cohort can't attack unless you've cast a creature spell this turn.

Mogg Flunkies

Mogg Flunkies can't attack or block alone.

Death Spark

Death Spark deals 1 damage to any target.
At the beginning of your upkeep, if Death Spark is in your graveyard with a creature card directly above it, you may pay {1}. If you do, return Death Spark to your hand.

Reckless Impulse

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.