Orcish Oriflamme

Attacking creatures you control get +1/+0.

Goblin Sledder

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

Raging Goblin

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

Goblins of the Flarg

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)
When you control a Dwarf, sacrifice Goblins of the Flarg.

Zo-Zu the Punisher

Whenever a land enters the battlefield, Zo-Zu the Punisher deals 2 damage to that land's controller.

Goblin Shrine

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

Raiding Party

Raiding Party can't be the target of white spells or abilities from white sources.
Sacrifice an Orc: Each player may tap any number of untapped white creatures they control. For each creature tapped this way, that player chooses up to two Plains. Then destroy all Plains that weren't chosen this way by any player.

Power Surge

At the beginning of each player's upkeep, Power Surge deals X damage to that player, where X is the number of untapped lands they controlled at the beginning of this turn.

Goblin Lookout

{T}, Sacrifice a Goblin: Goblin creatures get +2/+0 until end of turn.

Aether Sting

Whenever an opponent casts a creature spell, Aether Sting deals 1 damage to that player.

Goblin Sappers

{R}{R}, {T}: Target creature you control can't be blocked this turn. Destroy it and Goblin Sappers at end of combat.
{R}{R}{R}{R}, {T}: Target creature you control can't be blocked this turn. Destroy it at end of combat.

Goblin Grappler

Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.)

Heat Stroke

At end of combat, destroy each creature that blocked or was blocked this turn.

Enslaved Scout

{2}: Enslaved Scout gains mountainwalk until end of turn. (It can't be blocked as long as defending player controls a Mountain.)

Goblin Rock Sled

Trample
Goblin Rock Sled doesn't untap during your untap step if it attacked during your last turn.
Goblin Rock Sled can't attack unless defending player controls a Mountain.

Goblin King

Other Goblins get +1/+1 and have mountainwalk.

Goblin Balloon Brigade

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

Goblin Grenade

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

Mana Geyser

Add {R} for each tapped land your opponents control.

Goblin Wizard

{T}: You may put a Goblin permanent card from your hand onto the battlefield.
{R}: Target Goblin gains protection from white until end of turn.

Flamestick Courier

You may choose not to untap Flamestick Courier during your untap step.
{2}{R}, {T}: Target Goblin creature gets +2/+2 and has haste for as long as Flamestick Courier remains tapped.

Goblin Chirurgeon

Sacrifice a Goblin: Regenerate target creature.

Goblin War Drums

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

Fervor

Creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Chaos Moon

At the beginning of each upkeep, count the number of permanents. If the number is odd, until end of turn, red creatures get +1/+1 and whenever a player taps a Mountain for mana, that player adds an additional {R}. If the number is even, until end of turn, red creatures get -1/-1 and if a player taps a Mountain for mana, that Mountain produces colorless mana instead of any other type.

Sparksmith

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

Adder-Staff Boggart

When Adder-Staff Boggart enters the battlefield, clash with an opponent. If you win, put a +1/+1 counter on Adder-Staff Boggart. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Goblin Chariot

Goblin Kites

{R}: Target creature you control with toughness 2 or less gains flying until end of turn. Flip a coin at the beginning of the next end step. If you lose the flip, sacrifice that creature.