Kommentar:

One land?

And its a nonbasic? How are you supposed to not get blown out by Wasteland?

Youre not.

Belcher is the epitome of the all-in deck. If your opponent doesnt have Force of Will? Probably just dead.

Instead of playing lands, you just play Land Grant, which allows you to grab a Forest (Taiga is a Forest that can tap for red mana). Belcher—based on the conditions of Goblin Charbelcher itself—doesnt want to play too many lands. You want to find your one to get it out of the deck... And when you go for the Empty the Warrens side of the deck, Land Grant builds storm as well.
Almost every card in the Belcher deck makes mana or draws a card so the vast majority of hands with either Charbelcher or Empty the Warrens can get there immediately...

For example:

Lions Eye Diamond
Land Grant
Elvish Spirit Guide
Tinder Wall
Rite of Flame
Seething Song
Goblin Charbelcher
You dont have any Mountains or other lands in your deck at this point, but that doesnt matter. Finding a land is only the stop condition on Goblin Charbelcher. You can go ahead and reveal a gazillion cards in your deck to kill the opponent.

I am sure you can imagine any number of hands that can, if you replace Goblin Charbelcher with Empty the Warrens, result in ten goblins on the first turn. While that is theoretically answer-able, the opponent is now on a two-turn clock and had better find an answer in a hurry.

I know what youre thinking:

The Charbelcher deck really has a lot of make mana now cards so it wants a Goblin Charbelcher or Empty the Warrens in its opening hand... why only three Warrens?

Im glad you asked!
Burning Wish allows you to store an extra Empty the Warrens in your sideboard so its really like you have seven copies of Empty the Warrens main deck. Plus you can get some bullets like Shattering Spree or Reverent Silence even in Game 1. Goblin War Strike? With a Burning Wish, ten Goblins off of a fast Empty the Warrens can be even more lethal!

Now on the subject of decks with the word Goblin in the title...