Mogg Sentry

Whenever an opponent casts a spell, this creature gets +2/+2 until end of turn.

Panic Attack

Up to three target creatures can't block this turn.

Mogg Alarm

You may sacrifice two Mountains rather than pay this spell's mana cost.
Create two 1/1 red Goblin creature tokens.

Spikeshot Goblin

{R}, {T}: This creature deals damage equal to its power to any target.

Goblin Shortcutter

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

Mountain

Raging Goblin

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

Reckless One

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

Downhill Charge

You may sacrifice a Mountain rather than pay this spell's mana cost.
Target creature gets +X/+0 until end of turn, where X is the number of Mountains you control.

Wave of Indifference

X target creatures can't block this turn.

Goblin King

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

Goblin Caves

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