Mountain

Beetleback Chief

When Beetleback Chief enters, create two 1/1 red Goblin creature tokens.

Battle-Rattle Shaman

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

Boggart Brute

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

Muxus, Goblin Grandee

When Muxus, Goblin Grandee enters, reveal the top six cards of your library. Put all Goblin creature cards with mana value 5 or less from among them onto the battlefield and the rest on the bottom of your library in a random order.
Whenever Muxus attacks, it gets +1/+1 until end of turn for each other Goblin you control.

Outnumber

Outnumber deals damage to target creature equal to the number of creatures you control.

Thriving Bluff

Thriving Bluff enters tapped. As it enters, choose a color other than red.
{T}: Add {R} or one mana of the chosen color.

Ornery Goblin

Whenever Ornery Goblin blocks or becomes blocked by a creature, Ornery Goblin deals 1 damage to that creature.

Burn Bright

Creatures you control get +2/+0 until end of turn.

Goblins

Makeshift Munitions

{1}, Sacrifice an artifact or creature: Makeshift Munitions deals 1 damage to any target.

Goblin Arsonist

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

Goblin Commando

When Goblin Commando enters, it deals 2 damage to target creature.

Goblin Instigator

When Goblin Instigator enters, create a 1/1 red Goblin creature token.

Goblin Shortcutter

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