The deck has multiple threats. First is [Goblin Rabblemaster]which can almost singlehandedly win the game for you. However the main purpose of the [Goblin Rabblemaster] and hordeling outburst is to get a token or two in play to sacrifice with [Jalira, Master Polymorphist].
In doing that you are looking to fish up: [Archetype of endurance] or [Archetype of Imagination] or [Stormtide Leviathen] or [Goblin Rabblemaster]
All of which drastically change the game in your favor.
=========================================
The deck itself was made after reading reading the inevitability article from Wizard's Level One Column. See below for link.
The idea was to take the burn/goblin token deck my friend was using and make it so there was an inevitable outcome, that means I will win.
The deck is either a fast deck, rolling over an opponent quickly with a bunch of goblins, burning early creatures and your opponent. By turn 5 you can starting fishing for any of the archetypes or storm tide leviathan.
Once you have Stormtide out your opponent can hardly attack.
Archetype of Imagination gives you a horde of flying goblins, that can't be blocked by your opponent unless they have a bunch of creatures with reach.
Archetype of endurance means your creatures can't be targeted for removal. Which means if they miss taking out Jalira before then, the only way they can really win is a board wipe.
http://magic.wizards.com/en/articles/archive/level-one/inevitability-2014-12-08
